Screaming Penguin

Google recently put together a Wave developer FAQ based on common stuff from the groups and notes from a hackathon: http://wave-api-faq.appspot.com/. In it are a few new tidbits that weren't previously well documented. Also, the have added an articles section to the API docs, it has some new stuff too, such as debugging robots and gadgets, and communicating from robot to gadget and vice versa - http://code.google.com/apis/wave/articles.html.