I just signed up--you can find me at twitter.com/gretchasketch.
Knowing me, it'll probably just be song lyrics and movie quotes, not that there's anything wrong with that.
I <3 Twitter. You can find me at twitter.com/rachelskirts. I only follow 84 people right now (long story... just know that it's an OCD thing), but I can be bribed to bump someone else off the list if you're really desperate to have me following you.
Bonus Features: My sock monkey also has his own Twitter account (@JuanPedro), and I'm tweeting my way through the Lord of the Rings movies (@LOTR).
I signed up for twitter a couple of months ago and have become addicted. I use it to follow comics and blog updates of some of my fave artists/bloggers.
I'm loki_jb on twitter. Feel free to add, anyone and everyone! I've pretty much added everyone in this thread.
I hadn't heard of it, specifically, but I stumbled upon this page today. It's a wiki on Twitter that has a slew of applications that lets you import/export tweets through different applications.