Johns Hopkins has set up their own instance of Lyceum, ibiblio developed open source group blogging environment, at http://blogs.jhu.edu/
Lyceum allows schools and groups to become their own blogger.com (or typepad or livejournal etc) quickly and easily. The open source nature of the code allows for maximum local customization and for sharing of new and improved features. Lyceum will support from 2 to 200,000 blogs (or more).
for more on Lyceum see http://lyceum.ibiblio.org/