I quite like it. I think it has a lot of potential. It's not quite 100% user friendly yet though imo, I feel if I introduced it to some of my Facebook friends they would still prefer Facebook because that's what they know. It will take a lot to convert a Facebook user as they are so comfortable with it.
Also, I think this is pretty stupid: http://www.google.com/support/+/bin/...r=1344540&rd=1