Google buzz? No thanks.
Sure, I will keep the app running for a while, see what people do with it, even post on it. But the fact is it makes my nice clean gmail into a mess. Constant updates and notifications. No thanks.
Facebook and twitter are similar, but the difference is I can close them out and get work done. I use gmail in most everything I do. Having to go in and edit options all the time depending on my activity on gmail seems like an effort I won't want to make.