Here's the problem with APPS: With a tool like Tweetdeck we'd never need to go to the Circles/Google+ page, and that's where the value is for Google. That's what's happened to Twitter. No one goes to Twitter.com. 80% of Twitter's traffic is via APIs and 3rd party Apps. Twitter cannot serve you an AD if you're not on Twitter.com. (But I'm sure in-stream ADs are coming, because Twitter has yet to figure out how to make money on Tweets.) // So for now the value to Google is to get us into the their G-Universe and then sell us, track us, know us. With Google it's all going to be about integration. I'm not so convinced that's a great thing. Sometimes we need separation to keep things straight.
It's always good to remember that anything you share electronically can be reshared without your permission. If it can be seen on a screen it can be screen captured and posted on a roadside billboard. If you share publicly, know that the information in the cloud stays in the cloud, forever. If you share privately, now that "privacy" is a concept that Facebook and now Google+ will change on a regular basis. It may say privacy settings, but it's all public. Don't share if you're not prepared to share with everybody.