Allan Odgaard wrote at Wed, 13 Oct 2004 about [TextMate] Project Drawer Keys:
The reason why groups cannot be double clicked to activate rename (as some have requested) is that I plan to do it more like Finder in the future, so that double clicking a group will enter that group, and make the project drawer only show the files contained in the group (there'll be a back button of course).
I have the feeling that these request will go away if you automatically go to renaming a folder once you create new one.
Jeroen.