I just finished working through Google's Wave Robot: Python Tutorial. The API Reference looks a bit imposing. Is there anything else I can look at to get up to speed?
Have a look at the Python sample bots on the sample gallery : http://wave-samples-gallery.appspot.com/results?language=Python&api=Robots. This can give you ideas of bots to make, and show you good practices, too. The gallery outlines the specific features of the API used by each bot.
Also, you could join the Wave API group on http://groups.google.com/group/google-wave-api. There's pretty good talk on there about it.