Keeping plugged-in on web tech

I have joined Twitter because it seems to be what all the plugged-in, tech-savvy pros are doing. I had been holding off because I don’t need another toy to break my focus, but there comes a time when a IT guy has to show that he’s on top of things. If it’s too distracting, I can let it idle away, but can add it to my social profile (Google, Facebook, LinkedIn). I can see that in order to make it really useful, you have to spend some time building up networking capital (critical mass) so that people pay attention to it.