I signed up for twitter a few months ago. I now have 18 followers, despite having never tweeted anything yet. 7 of my followers I actually know in real life, the other 11 I don't... as with rowjimmy, I don't see myself ever really using Twitter #music for "Crowd sourced music recommendations".
a few times I have almost tweeted something. but then I didn't because I thought "that would be a lame first tweet".