1. Anforderungen an die Gestaltung der Community
3.3. Social Tagging & Bookmarking
3.5. Social Networking & Communication
http://www.scribd.com/doc/2286799/Can-we-use-Twitter-for-educational-activities
http://steve-wheeler.blogspot.com/2009/01/teaching-with-twitter.html
3.6. Sharing (Unterlagen, Kalender, Fotos, Filme)