Just a FYI that I’ve been using Twitter more lately. My account is http://twitter.com/adamjury. I’m finding it a fun way to be social and silly with friends who I’m not often in touch with over phone or IM, and I’m actually meeting some totally random and new people over it.
For Macheads, Twitterrific is the bomb. I’m experimenting with Twirl too, which is multi-platform, based on the Adobe AIR engine.