I'm a Google Fanboy, but as far as microblogging is concerned, i will stick with twitter. I was kinda irritated when Google came out with Buzz, cus it looked like a rehashed twitter+facebook, n dis comin from Google was a bit wierd as these guys set standards, not follow them.
As of now its twitter all the way, but i wont be surprised if Buzz takes over twitter in the coming months, as it already has much more gmail users than there are twitter users. plus the word limit isnt there. i donno hw but i have a strong feeling that Buzz will take over twitter. But i wud never ever give up twitter 4 Buzz