At present I'm developing my community using WPMU 2.8.6 and BP 1.1.2.
Using the built-in forums component of BP... but I think it's so simple... i.e. the search is pretty bad, you cant add files (like this forum can), and some other limitations...
So I wonder if it's better to make a separate install of BBPress and integrate it with BP... it would make the BP forums better?.
What do you think guys?, what option did you choosen?, how is running here at WPMUDEV?