diff --git a/README.rst b/README.rst
index 9aa4bb8..0869458 100644
--- a/README.rst
+++ b/README.rst
@@ -30,13 +30,6 @@ aiomsg
 
 Pure-Python smart sockets (like ZMQ) for simpler networking
 
-.. figure:: https://upload.wikimedia.org/wikipedia/commons/5/5e/NetworkDecentral.svg
-    :target: https://commons.wikimedia.org/wiki/File:NetworkDecentral.svg
-    :alt: Diagram of computers linked up in a network
-
-    :sub:`Attribution: And1mu [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)]`
-
-
 Table of Contents
 -----------------
 
@@ -46,6 +39,43 @@ Table of Contents
 Demo
 ====
 
+Put on your *Software Architect* hat, and imagine a microservices layout
+shown in this block diagram:
+
+.. figure:: https://raw.githubusercontent.com/cjrh/aiomsg/master/images/microservices.svg?sanitize=true
+    :alt: Layout of an example microservices architecture
+
+- One of more features are exposed to the world via the *load balancer*, **N**.
+  For example, this could be *nginx*.
+- Imagine the load balancer proxies HTTP requests through to your backend
+  webservers, **H**. Your webserver may well do some processing itself, but
+  imagine further that it needs information from other microservices to
+  service some requests.
+  - Both instances of **H** are identical, there are two of them for
+  redundancy.
+- One of these microservices is **A**. It's not important what it does, just
+  that it does "something".
+- It turns out that sometimes **A** needs information supplied by another
+  microservice, **B**. Both **A** and **B** need to do work so it's important
+  that they can both be scaled horizontally (ignore that "horizontal scaling"
+  would actually be in a vertical direction in the diagram!).
+
+The goal of **aiomsg** is to make it simple to construct these kinds of
+arrangements of microservices.
+
+We'll move through each of the services and look at their code:
+
+.. literalinclude:: examples/demo/h.py
+    :language: python3
+
+TODO: microservice A
+TODO: microservice P
+TODO: microservice B
+TODO: microservice M
+
+Simple Demo
+===========
+
 Let's make two microservices; one will send the current time to the other.
 Here's the end that binds to a port (a.k.a, the "server"):
 
@@ -934,7 +964,7 @@ These are the rules:
 
 #. **Every payload** in either direction shall be length-prefixed:
 
-   .. code-block::
+   .. code-block:: shell
 
         message = [4-bytes big endian int32][payload]
 
diff --git a/docker/Dockerfile38.demo b/docker/Dockerfile38.demo
new file mode 100644
index 0000000..6936591
--- /dev/null
+++ b/docker/Dockerfile38.demo
@@ -0,0 +1,17 @@
+FROM python:3.8-alpine3.10
+
+RUN apk add --update \
+    openssl \
+    gcc \
+    python-dev \
+    musl-dev \
+    linux-headers \
+    libffi-dev \
+    libressl-dev \
+    && rm -rf /var/cache/apk/*
+
+COPY . /aiomsg
+
+RUN pip install -e aiomsg[all]
+WORKDIR /aiomsg
+CMD ["python", "-m", "pytest", "--cov", "aiomsg", "--cov-report", "term-missing"]
diff --git a/examples/demo/docker-compose.yml b/examples/demo/docker-compose.yml
new file mode 100644
index 0000000..dd10ddf
--- /dev/null
+++ b/examples/demo/docker-compose.yml
@@ -0,0 +1,13 @@
+version: '3'
+services:
+  h:
+    build: .
+    ports:
+    - "5000:5000"
+    volumes:
+    - .:/code
+    - logvolume01:/var/log
+    links:
+    - redis
+  redis:
+    image: redis
diff --git a/examples/demo/h.dockerfile b/examples/demo/h.dockerfile
new file mode 100644
index 0000000..f97cdea
--- /dev/null
+++ b/examples/demo/h.dockerfile
@@ -0,0 +1,10 @@
+FROM python:3
+
+WORKDIR /usr/src/app
+
+#COPY requirements.txt ./
+RUN pip install --no-cache-dir aiomsg
+
+COPY . .
+
+CMD [ "python", "./your-daemon-or-script.py" ]
diff --git a/examples/demo/h.py b/examples/demo/h.py
new file mode 100644
index 0000000..b072e7d
--- /dev/null
+++ b/examples/demo/h.py
@@ -0,0 +1,66 @@
+# microservice: H
+import asyncio
+import json
+import time
+from typing import Dict
+
+from aiomsg import Søcket
+from aiohttp import web
+from dataclasses import dataclass
+
+
+@dataclass
+class Payload:
+    msg_id: int
+    req: Dict
+    resp: Dict
+
+
+REQ_COUNTER = 0
+BACKEND_QUEUE = asyncio.Queue()  # TODO: must be inside async context
+pending_backend_requests: {}
+
+
+async def backend_receiver(sock: Søcket):
+    async for msg in sock.messages():
+        raw_data = json.loads(msg)
+        data = Payload(**raw_data)
+        f = pending_backend_requests.pop(data.msg_id)
+        f.set_result(data.body)
+
+
+async def backend(app):
+    async with Søcket() as sock:
+        await sock.bind("127.0.0.1", 25000)
+        asyncio.create_task(backend_receiver(sock))
+        while True:
+            await sock.send(time.ctime().encode())
+            await asyncio.sleep(1)
+
+
+async def run_backend_job(sock: Søcket, data: Payload) -> Payload:
+    f = asyncio.Future()
+    REQ_COUNTER += 1
+    pending_backend_requests[REQ_COUNTER] = f
+    backend_response = await f
+    data = dict(result=backend_response)
+
+
+async def handle(request):
+    nonlocal REQ_COUNTER
+    # TODO: get post data from request to send to backend
+
+    f = asyncio.Future()
+    REQ_COUNTER += 1
+    pending_backend_requests[REQ_COUNTER] = f
+    backend_response = await f
+    data = dict(result=backend_response)
+    return web.json_response(data)
+
+
+app = web.Application()
+app.on_startup.append(backend)
+app.add_routes([web.post("/process/{name}", handle)])
+
+if __name__ == "__main__":
+    web.run_app(app)
diff --git a/examples/lb/README.rst b/examples/lb/README.rst
new file mode 100644
index 0000000..a8649ad
--- /dev/null
+++ b/examples/lb/README.rst
@@ -0,0 +1,2 @@
+Load balancer in which each of the workers asks for work. This is much better
+than naive round-robin message distribution.
diff --git a/examples/lb/producer.py b/examples/lb/producer.py
new file mode 100644
index 0000000..399ee9b
--- /dev/null
+++ b/examples/lb/producer.py
@@ -0,0 +1,22 @@
+import asyncio
+import logging
+import aiorun
+import aiomsg
+from random import randint
+
+
+async def main():
+    async with aiomsg.Søcket() as sock:
+        await sock.bind()
+        async for id_, msg in sock.identity_messages():
+            payload = dict(n=randint(30, 40))
+            logging.info(f"Sending message: {payload}")
+            await sock.send_json(payload, identity=id_)
+            await asyncio.sleep(1.0)
+
+
+logging.basicConfig(level="INFO")
+try:
+    aiorun.run(main())
+except KeyboardInterrupt:
+    pass
diff --git a/examples/lb/requirements.txt b/examples/lb/requirements.txt
new file mode 100644
index 0000000..42d5101
--- /dev/null
+++ b/examples/lb/requirements.txt
@@ -0,0 +1 @@
+aiorun
diff --git a/examples/lb/run.py b/examples/lb/run.py
new file mode 100644
index 0000000..fc3c262
--- /dev/null
+++ b/examples/lb/run.py
@@ -0,0 +1,38 @@
+# Example: load balancer
+
+import os
+import sys
+import shlex
+import signal
+from pathlib import Path
+import subprocess as sp
+
+this_dir = Path(__file__).parent
+
+
+def make_arg(cmdline):
+    return shlex.split(cmdline, posix=False)
+
+
+# Start producer
+s = f"{sys.executable} {this_dir / 'producer.py'}"
+print(s)
+producer = sp.Popen(make_arg(s))
+
+# Start worker
+s = f"{sys.executable} {this_dir / 'worker.py'}"
+worker = sp.Popen(make_arg(s))
+
+with producer, worker:
+    try:
+        producer.wait(20)
+        worker.wait(20)
+    except (KeyboardInterrupt, sp.TimeoutExpired):
+        producer.send_signal(signal.CTRL_C_EVENT)
+        worker.send_signal(signal.CTRL_C_EVENT)
+
+    # try:
+    #     producer.wait(20)
+    #     worker.wait(20)
+    # except KeyboardInterrupt:
+    #     pass
diff --git a/examples/lb/worker.py b/examples/lb/worker.py
new file mode 100644
index 0000000..7971940
--- /dev/null
+++ b/examples/lb/worker.py
@@ -0,0 +1,53 @@
+import asyncio
+import logging
+import signal
+
+import aiorun
+import aiomsg
+from concurrent.futures import ProcessPoolExecutor as Executor
+
+
+def fib(n):
+    if n < 2:
+        return n
+    return fib(n - 2) + fib(n - 1)
+
+
+async def fetch_work(sock: aiomsg.Søcket) -> dict:
+    await sock.send(b"1")
+    work = await sock.recv_json()
+    return work
+
+
+async def main(executor):
+    async with aiomsg.Søcket() as sock:
+        await sock.connect()
+        while True:
+            # "Fetching" is actually a two-step process, a send followed
+            # by a receive, and we don't want to allow shutdown between
+            # those two operations. That's why there's a guard.
+            work = await fetch_work(sock)
+            logging.info(f"Worker received work: {work}")
+            # CPU-bound task MUST be run in an executor, otherwise
+            # heartbeats inside aiomsg will fail.
+            executor_job = asyncio.get_running_loop().run_in_executor(
+                executor, fib, work["n"]
+            )
+            result = await executor_job
+            logging.info(f"Job completed, the answer is: {result}")
+
+
+def initializer():
+    """Disable the handler for KeyboardInterrupt in the pool of
+    executors.
+
+    NOTE that the initializer must not be inside the __name__ guard,
+    since the child processes need to be able to execute it. """
+    signal.signal(signal.SIGINT, signal.SIG_IGN)
+
+
+# This guard is SUPER NECESSARY if using ProcessPoolExecutor on Windows
+if __name__ == "__main__":
+    logging.basicConfig(level="INFO")
+    executor = Executor(max_workers=4, initializer=initializer)
+    aiorun.run(main(executor))
diff --git a/examples/overlapped/README.rst b/examples/overlapped/README.rst
new file mode 100644
index 0000000..7a8777d
--- /dev/null
+++ b/examples/overlapped/README.rst
@@ -0,0 +1,9 @@
+This is a basic test of plain socket connectivity and CTRL-C handling.
+It should be possible to execute the run.py launcher which will start up
+two subprocesses, one of which is a server and one is a client. And
+when you press CTRL-C, everything should shut down cleanly without
+tracebacks.
+
+If you execute run.py in a PyCharm run configuration, make sure to enable
+the "Emulate terminal in output console" option. This will allow you
+to press CTRL-C to trigger the KeyboardInterrupt.
diff --git a/examples/overlapped/producer.py b/examples/overlapped/producer.py
new file mode 100644
index 0000000..ec157a2
--- /dev/null
+++ b/examples/overlapped/producer.py
@@ -0,0 +1,27 @@
+import asyncio
+from asyncio import StreamReader, StreamWriter
+
+
+async def cb(reader: StreamReader, writer: StreamWriter):
+    try:
+        while True:
+            data = await reader.read(100)
+            print(data)
+    except asyncio.CancelledError:
+        writer.close()
+        await writer.wait_closed()
+
+
+async def main():
+    server = await asyncio.start_server(cb, host="127.0.0.1", port=12345)
+    async with server:
+        try:
+            await server.serve_forever()
+        except asyncio.CancelledError:
+            print("server cancelled")
+
+
+try:
+    asyncio.run(main())
+except KeyboardInterrupt:
+    pass
diff --git a/examples/overlapped/requirements.txt b/examples/overlapped/requirements.txt
new file mode 100644
index 0000000..42d5101
--- /dev/null
+++ b/examples/overlapped/requirements.txt
@@ -0,0 +1 @@
+aiorun
diff --git a/examples/overlapped/run.py b/examples/overlapped/run.py
new file mode 100644
index 0000000..bacb7e6
--- /dev/null
+++ b/examples/overlapped/run.py
@@ -0,0 +1,35 @@
+# Example: load balancer
+
+import os
+import sys
+import shlex
+import signal
+from pathlib import Path
+import subprocess as sp
+
+this_dir = Path(__file__).parent
+
+
+def make_arg(cmdline):
+    return shlex.split(cmdline, posix=False)
+
+
+# Start producer
+s = f"{sys.executable} {this_dir / 'producer.py'}"
+print(s)
+producer = sp.Popen(make_arg(s))
+
+# Start worker
+s = f"{sys.executable} {this_dir / 'worker.py'}"
+worker = sp.Popen(make_arg(s))
+
+with producer, worker:
+    try:
+        producer.wait(100)
+        worker.wait(100)
+    except (KeyboardInterrupt, sp.TimeoutExpired):
+        producer.send_signal(signal.CTRL_C_EVENT)
+        worker.send_signal(signal.CTRL_C_EVENT)
+
+        producer.wait(100)
+        worker.wait(100)
diff --git a/examples/overlapped/worker.py b/examples/overlapped/worker.py
new file mode 100644
index 0000000..d2f8527
--- /dev/null
+++ b/examples/overlapped/worker.py
@@ -0,0 +1,22 @@
+import asyncio
+
+
+async def main():
+    print("worker connecting")
+    reader, writer = await asyncio.open_connection("127.0.0.1", 12345)
+    print("worker connected")
+    try:
+        while True:
+            writer.write(b"blah")
+            await writer.drain()
+            print("sent data")
+            await asyncio.sleep(1.0)
+    except asyncio.CancelledError:
+        writer.close()
+        await writer.wait_closed()
+
+
+try:
+    asyncio.run(main())
+except KeyboardInterrupt:
+    pass
diff --git a/images/microservices.svg b/images/microservices.svg
index a1aadf2..689abf7 100644
--- a/images/microservices.svg
+++ b/images/microservices.svg
@@ -1,390 +1,661 @@
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diff --git a/setup.py b/setup.py
index fbd4113..26a9d5c 100644
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,7 @@
 extras_require = {
     "dev": ["check-manifest", "colorama", "pygments", "twine", "wheel", "aiorun"],
     "test": ["pytest", "pytest-cov", "portpicker", "pytest-benchmark"],
+    "demo": ["aiohttp"],
     "doc": ["sphinx"],
 }
 extras_require["all"] = list(set().union(*extras_require.values()))