I just finished explaining my girlfriend how to use Subversion and thought I'd check up on the status of the GUI clients out there. After some searching, I stumbled into one I had never seen before, and it looks great! It's called SvnX and you can get it from here.

It's very close to what I had been looking for since the beginning. It even offers repository browsing and checkout. Another nice touch is the integration of Apple's FileMerge, which is one of the nicest diff and merge utilities that I have ever seen.

At last I will not have to regret the Bitkeeper GUI tools anymore!