There is a textmate feature that may not get mentioned as often, but it's my favorite: Developer access. There is a textmate mailing list where users regularly bombard the dev with ideas and suggestions. Responses are immediate and thoughtful. I use the somewhat obscure Dvorak + command-Querty keyboard layout, and it wasn't working quite right, so I let Allan Odgaard know via the list. The fine fellow asked some questions, and fixed it up.

There is almost nothing you can't do with this editor. And if you do anythin with Ruby on Rails, this is the place to be.