Steven Tedjamulia, the Sr. PM for Vignette Community Applications gives a good tour of the 7.1  product (see the video).  New with this version are idea management, presentation management, and video.   The UI is nice and intuitive for community members to use.

I expect to see more CRM companies jumping into the community space.  Given CRM companies existing product platform and relationships with clients, it makes sense to bundle these together as an integrated offering.