Allan,
TextMate 2.0 looks really good. It's very exciting to finally have our hands on it after such a long wait. I love the new file browser sidebar replacing the drawer but have a couple items as food for thought. I know you aren't asking for feedback at this point so I hope you don't mind.
First, the "new file" and "new folder buttons from 1.x are gone. I hope you'll bring them back. I use them quite a bit.
Second, I always place the drawer on the right side in 1.x. If you can make an option for this that would be cool.
Finally, a couple of aesthetic items. I would prefer the toolbar on the bottom of the file browser as this would match the toolbar on the editor side and not compete with the tab bar visually. It would also be cool if the sidebar could be themed so it matches our text. I prefer a dark background when editing and the sidebar is currently bright white, while others might like the bright white or other light background.
Also, I assume the theme editor is missing because this is Alpha and will eventually return to 2.0. Is that correct?
Regards, Matthew