Step by Step UI Design
By the way, the app that I'm designing in this eBook is a Rails+Backbone.js open-source chat app, kind of like an open-source Campfire. I'm working on it in collaboration with the Bushido (YC S11) guys. It's not out yet, but if you're interested you can sign up for the upcoming beta here: <a href="http://kandan.me/" rel="nofollow">http://kandan.me/</a>