This is a super simple module written as a C++ binding. It does not show how to handle async io, but at least it illustrates how the code hooks into node and v8. This is just a place to start...
Download, build and test instructions:
# Install node-gyp globally if not installed yet
npm install -g node-gyp
# Clone, build and test
git clone git://github.com/lupomontero/node-cpphello.git
cd node-cpphello
node-gyp configure build
npm test
More info here: Writing node.js modules in C++
Further reading: