Twitter Drawback (at least in Venezuela):
Twitter (noun): the micro-blogging web service
(to) twitter (verb): to update messages via PC or cell phone.
Tweets (noun): people's posts
Twitterer: the one who twitters
*Tweeps: Twitter people / followers
*Tweet exhaustation: the flooding, never ending tweets
Tworn: Twitter porn
Twammer: Twitter spammer
Twitter & education:
A teacher's guide to Twitter
Microblogging in Education
Educational tool: Twitter
50 ideas on using Twitter for education
Twitter in higher education
Directory of Learning Professionals on Twitter Word a day
Graham Stanley' six things
Teaching with Twitter
The English Language Teacher's Guide to Twitter (Karenne Sylvester)
More on Twitter
The always irreverent but smart Chris Pirillo suggests 10 ways to use Twitter.
Twhirl: A desktop client for social software such as Twitter
Tweet Penguin: Find new Twitter followers with similar interests
Tweet Exhaustation: An interesting article on why people can feel overwhelmed with Twitter and how to overcome this.
Filesocial: To upload documents and share with other tweeps.
Twitstory: to back up your tweets
TwHistory: To learn about North American history in 140 words.
Twitter Hashtags: Learn how to use hashtags