WordPress MU

This is a preemptive question... I haven't even started trying to do this. I've found some threads on this on the regular WP forum.

Has anyone done this succesfully? Integrating PunBB with WPMU I mean? With a single sign-on?

Can it be done? Is there a plugin? Pitfalls? Drawbacks?

Nope, no plugin. If you can, try to go with bbpress. It's a breeze to integrate with WPMU.

I see a couple of walkthrus over in WP.org land right off:

http://wordpress.org/support/topic/30068

http://wordpress.org/support/topic/45395

Haven't tried it myself though.

I had seen the walkthrus, but before I try that and get into a huge mess I wanted to know if any WPMU users have done this successfully.

bbpress looks like a very interesting alternative. Can I see it in action somewhere?

http://daria.be
http://daria.be/forums

I only have the username and passwords being used between them though. I have plans on adding in the cookie information and maybe the theme once I get a handle on stuff. (Doing the support system today)

That's bbpress? It looks pretty decent. I'm looking for a lite solution anyway.