Create a daily newspaper from Twitter and Facebook. Create stories from an twitter account, hashtag, or list.
Create your own Twitter groups to share and tweet with. Send a direct message (DM) to a member of the group and it automatically converts to a tweet that all members can see. A good tool for classrooms, clubs, and other organizations.
"Graph your Twitter Stats including
* Tweets per hour
* Tweets per month
* Tweet timeline
* Reply statistics
In use by over 100,000 Twitter-folk!"
60 Ways To Use Twitter In The Classroom By Category - nice list from TeachThought blog.