Here is an excellent article explaining what Twitter is and how it works:
http://www.iadam.org/2008/05/03/quick-guide-to-twitter/
It’s funny, because Adam (the author) talks about how people always think he’s weird for being a part of something like Twittter, and that Twitter itself is weird… I usually get a similar reaction, and I had similar feelings when my friend Taylor first introduced me to it. But, I pushed through my qualms, and now I don’t think I could live without it. I can honestly say I’m proud to be a member of the Twitter community. 
BTW, my Twitter username is KingTiger.
