Although I dislike the fact that I don't see what it is open in the single-row model, I like how Eclipse resolves this: There's a shortcut (Apple-E) that expands the list of wrapped tabs. In that box there's a handy textfield that filters as you type (on the fly) and has the keyboard focus.
This way I can switch quickly with a few keystrokes. Of course you can do that with the mouse but that's rather slow compared to the keyboard in this case because in addition to move the hand out ouf the keyboard *you* have to search for the filename in a probably long list of choices.
I recorded a movie to depict the sequence, there Apple-E is typed to make the yellow box pop up:
http://www.hashref.com/textmate/eclipse_tabs.mov
-- fxn