Re: Buddypress theme for bbPress ?
If you are asking about bbPress themes in general, then Google and you’ll see that there are a number of themes available for bbPress.
If you’re asking about specially customized BuddyPress-friendly bbPress themes, then the answer is as jjj points out above. With v1.0 of BuddyPress just released, theme designers are more than likely working hard at creating new, custom themes.
Once bbPress is publicly released in a stable version, I would imagine that some theme designers will create BuddyPress-friendly bbPress themes as well.
Remember, these are open source projects. The vast majority of the human resources poured into the community are done so for free. WordPress, BuddyPress, and bbPress all come with themes by default. It is up to the community to take those basic themes and create more flexible, powerful designs.