I'm on Twitter now as @sevensideddie.[1. Someone who's only ever made a handful of tweets two years ago already took @d7. Grr!] There's a widget down in the sidebar here that shows my last few tweets.
I update it and read the people I follow about as often as expected—infrequently and not often enough to read everything, respectively—but it's a diversion that I can spend as little or as much time on as I have. I've discovered that it's another vector for running into good blog posts that doesn't quite overlap with what I discover via feeds and posts mentioned in blogs I read regularly. So far it's a win!