I've downloaded and installed 1.1b12. Seeing that the list of languages was rather skimpy (in particular, no Perl or Python), I followed the instructions on the TM Wiki to checkout the complete set of bundles from the Subversion repository. They are now sitting in / Library/Application\ Support/TextMate. Also following the Wiki's suggestion, I trashed the Bundles folder in the TextMate.app package. Upon restarting TM, I see more languages in the View/Language submenu, but not nearly as many as there are tmbundles in the Bundles folder. I certainly don't need most of them, but I'd like to know why they're not showing up.
Also, is it appropriate to trash the Settings and Support folders in TextMate.app now that I have copies in /Library/Application\ Support/ TextMate?
-- Mark Lawrence