UCLA Course Management Systems Consortium, see Wiki Site section.
Paul Gannon,
This isn't quite at the level you're talking about, but we're using wiki sites, sometimes combined with blogs and pretty html up front for a couple campus groups where we're trying to build communities among staff.
UCLA Programmers Exchange - http://programmers.ucla.edu (though the wiki site is restricted to UCLA IPs)
Course Management Consortium - more of a campus project -
http://www.sscnet.ucla.edu/classweb/consortium/ open to the world, except you need to login to edit the wiki site or blog.
Instructional Technology Forum - private for those who support course management systems and other instructional technology applications here at UCLA.
And I've been using a wiki for several years with my student programmers to keep track of their projects.
The wiki software we got from the book "The Wiki Way" and adapted heavily. For the blog we use MovableType.
I've been pushing these kinds of tools for the groups I'm in because we're way decentralized here at UCLA and we need to stay in touch without a ton of meetings.
Mike Franks
Social Sciences Computing, UCLA
homepage: http://www.sscnet.ucla.edu/ssc/franks/