I'm liking G+, its not as polished as Facebook, but there are some new changes afoot with the streams which should make reading a little easier. I think for people like me, who never use twitter, G+ is going to be a bit of a twitter killer. G+ have been pretty smart, in that they are taking on a number of overlapping businesses in one go:
FB, Twitter and Quora. The latter is very interesting indeed, I got all excited about it, but now totally lost interest, so thinking G+ might actually have a better chance of making this work!
I'm looking forward to the business cases!