PlugJam is a solution for schools, colleges and universities looking to bridge the gap between existing campus based tools and Web 2.0 services allowing students to use their favorite social networking environment or Web Service to access their campus based resources.
EtherPad - web-based word processor that allows people to work together in really real-time. Create your own URL's to documents. Permanent, undo versions stored. Text based (not RTF yet)
When multiple people edit the same document simultaneously, any changes are instantly reflected on everyone's screen. The result is a new and productive way to collaborate on text documents, useful for meeting notes, drafting sessions, education, team programming, and more.