Decided I wanted to brush up on my coffeescript-fu and realised I hadn't set it up since moving to Lion. Setup couldn't be simpler thanks to homebrew
brew install node
Caveats:
Please add /usr/local/lib/node to your NODE_PATH environment variable to have node libraries picked up.
curl http://npmjs.org/install.sh | sh
npm install -g coffee-script
The above steps are also detailed here.