The BuddyPress social networking layer for UCalgaryBlogs was just updated, but something imploded during the update. The data is all still safe, and I’m tracking down causes and fixes. Hopefully everything will be back up and running normally as expected soon.
All blogs should be working normally – the only thing affected is the social networking layer, which was running the front page of UCalgaryBlogs.ca (so, in the meantime, it has reverted to a previous design)