This repo contains the code (and text) for HappyFunCorp's Webthereum tutorial.
Note that this tutorial uses a specific version of the web3 library, as the latest version released two days after this tutorial was published uses different method signatures (only temporarily, though, as I understand it, until 1.0 is formally released). If you originally accessed an old version of the tutorial, replace the line
npm install web3
npm install firstname.lastname@example.org