I've been working on a daily basis with the TM2 alphas since their release, and so far this is the only piece I really wish I had.  In every other way, the file browser, favorites, scm, and .tm_properties files have worked fantastically for me.

One other enhancement that would really help is being able to associate shortcut keys with favorites.  Maybe something along the lines of how they can be associated with AppleScripts in Scripts menus.  

Rob