I bought the Textmate for Rails screencast at www.peepcode.com. It is excellent. It walks you through keyboard shortcuts, subversion, testing and bundles. 55 minutes of powerful textmate in action!!! RJS templates screen cast is also available for the same price ($9).
Bundles are great. Check out the Snipler site: http://snipplr.com/.
This lets you store and retrieve code snippets directly into Textmate, your code and other's.
