Well, Twitter has bit me, and bit me hard. I had a cresting wave of skepticism when I first created the account, which wasn't assuaged much by picking my less than dozen online friends and colleagues to follow. I've heard that your first few weeks really are nothing more than talking to yourself, which I found to be pretty much true.
But now...besides exchanging non-sequitors with my conference drinking buddies, I actually pick up on interesting articles, blogs etc to read. I have strange voyeuristic moments into semi-friends' personal lives. I have people I've never met following me (why?). Best of all, I can see how Twitter really works as a virtual megaphone. The media contacted us about a tiny bit of legislation embedded in a bill in Congress that calls for identity confirmation of online learners. Shades of George Orwell, Batman! As I twittered about this, you could just see folks' heads snapping around and saying "what the...". And that's cool...
