There is a
##textmate IRC channel on freenode.net.
TextMate Cheat Sheet
Soryu has written two TextMate tutorials dealing with setup and basic usage.
You can subscribe to the screencast RSS feed via iTunes.
Here is a list with direct links to a few of the screencasts in recommended viewing order:
- Scope Based Customizations (21:26)
- Working With Numbers and Columns (11:41)
- Inserting HTML Tags (7:19)
- Objective-C Part 1 (4:32)
- objective-C Part 2 (10:39)
For the full list with a brief summary see the online screencast page.