Nice start, looks like a nice bridge to Vim for textmate users.

It's missing a few of the basic vim movement commands (which I have on a wallpaper I put together http://naleid.com/blog/2010/10/04/vim-movement-shortcuts-wal...), but has most of the big ones. The ones I use quite a bit that don't seem implemented are:

C-d - half page down

C-u - half page up

ge/gE - go to the end of the previous word (you do have e/E for next word)

( - previous sentence

) - next sentence