In the recent weeks, Google+ has had 2 pretty low-profile updates. The first one added a notification tray, and the most recent one was supposedly just a bug fix release, but they've both been adding new things, presumably for a coming update. Yes, it's teardown time.
These teardown sessions seems to get more and more mysterious and strange as time goes on, and frankly I'm really not sure what's going on with these updates. I'm just going to lay out the facts first, and I'll throw some theories at you at the end. So put on your investigation hats - this should be fun.