Yeah, I'm jumping on the microblogging bandwagon. It seems like an interesting medium, with dynamics that kind of straddle normal blogs and IRC. Plus, one microblogging service (Twitter) has even had the distinction of being verbed, bringing it into the ranks of other web sensations such as Google, Facebook, and Rick Astley. There has to be something to it, right? As such, you can find me at http://identi.ca/rxp.
The first reaction I am expecting is, "Why aren't you using Twitter? You should use Twitter. Everybody else uses Twitter." Identi.ca is open-source, everything is licensed under Creative Commons, and supports a system for decentralized microblogging. Basically, I like the direction they're headed more than Twitter.
The other major question, of course, is "why are you blogging about this?" Frankly, microblogging would be a lot more fun if I actually knew more people that were doing it. That's why ya'll should try it too! Maybe it'll work out, maybe it'll end up being just a fad, but either way it should be interesting.