After kicking it around for a couple of weeks, I've gone ahead and joined Twitter. It looks like it's not going to be nearly as big a time suck as I feared, and I can use it through Gmail Chat, which I keep open all the time anyway. If it gets ridiculous, I can always bail on it, but I just couldn't hold off on trying it anymore.
If you're on Twitter, look me up, and we can follow each other around! :-) I'm florinda_3rs over there.