WordPress MU

My site uses MU and BB. I want a fuller-featured profile system, but don't want all of the Buddy baggage. What's the best way to provide extensive member profiles in such a configuration? Thanks.

Does this mean you'r going to get rid of Buddypress?
Anyways, there are some plugins to the job

Profiler: http://wordpress.org/extend/plugins/profiler/
Extended User Profile: http://wordpress.org/extend/plugins/extended-user-profile/

good luck!