Wow, world renowned support? 7 months and still no answers! I have the same issue guys, I get a ton of spam on my activity streams. I have 4 different anti-spam plugins, and guess what? Non of them help with the activity stream. This is something Buddypress needs to be looking at!
I am having a simular issue. I am using the Jooc theme, wordpress 3.0.1 and Buddypress 188.8.131.52, my admin bar is not showing on the front page. It does seem to be showing in the admin panel. I have deactivated, and deleted bp, and I checked the functions file for the theme as well, and it has the same code as posted above.