Hubzilla seems to do so many things, I wonder why social.coop don't use it? It has forums, blogs, wikis, calendars, events, chatrooms... and it federates.
Mind you, Drupal looked pretty nifty when I first started using it. Didn't take long for me to get disabused of that... it's all singing, all dancing, somewhat in the way that an aircraft carrier is.
@wu_lee yeah it can be quite an undertaking to get it to do what you want. It is quite powerful though.
@wu_lee Drupal. I'm working on a project to try and address that problem in Drupal, through #Drutopia. It's a work in progress but we're getting there. :)