If there was any doubt Google was taking Google+ seriously, let's put those fears to rest right now. Not only did their android app for Google+ come out in the Market only a few days ago, it's already seeing its first update to improve it even more.
The changelog is pretty scant, but multiple Gmail accounts was something plaguing folks from the start, and UI polish is always welcomed. Good job, Google. Now, invites for everyone!
More: Google+ forums