Mimic TouchCursor movements on Mac
I use both programs, and they are quite similar in spirit, but different in detail.  What I find works well for me in KeyRemap4MacBook is to turn on "normal mode" (I think that's what it is called).  I tap my Command key, then I can use vi-like keys, then I tap Command again (or use i).

Another useful thing is "simultaneous vi mode" (I think that's what it is called).  I press and hold s and d simultaneously, and while holding them I can use vi keys.  Quite similar to TouchCursor, except not with the space bar.

I wish there were programs that are more similar than these two, but I think this is currently where we are at.