Had to give Buzz a look see today. I am a Friend Feed user so I said what the hell, let me give it a shot.
I like the fact on my Mobile phone I can localize Buzzers and chat with them about local things..that's a plus. I also like the fact it is integrated with my Gmail inbox, which I have up most of the time. The only problem I can see with this is the multiple posts hitting the email.
Going to mess around with it a little more since Wave I just did not get whatsoever. I am thinking that that was more geared to a Corporate/Collaboration environment.
Friendfeed is a pretty easy thing, I always liked the fact that you are not "broadcasting" yourself as much as with Twitter. Twitter I find is alot of people thinking what they say is pretty important and we should all jump on their posts to see what their word is.

Follow me on Google Buzz..would love to see you!

http://www.google.com/profiles/FMCDebbie