[@_ck_ Participant 17 years, 5 months ago]

That wpmu tag is going to be your best friend:

https://bbpress.org/forums/tags/wpmu

Not many people with wpmu experience here.

I know Trent Adams uses it though (he’s also on IRC)

Also, wpmu 2.6 is a no-go with bbPress 0.9 because of cookies.