I don't mind the folks who only post rarely. It seems like quite a few Twitter users go semi-dormant for a while, but some are starting to wake up again.

I suspect a lot actually went to Jaiku or Pownce and are now returning to Twitter, where most folks seem to be.

I'm at 120 following. That seems like a bit much to keep up with, but most of that is from duplication of news feeds, not individuals. Every time it starts getting too bad, I go cut another news feed.

I noticed in one of your post about laptops in a meeting, you noted how it's never OK to waste people's time. This is true for Twitter, too, though I think each person will have to decide for themselves what constitutes a tweet with useful information in it!