CNET powered by WPMU
CNET’s Online Courses have been running on Wordpress MU for about two years now. I just finished upgrading to WPMU 1.2.3 from a highly customized pre RC version. (And lived to tell the tale 
Each course listed is its own WPMU blog (although it’s worth noting that the directory page itself that is linked to is actually running in a separate WP install, long story
