Google+ received a shot in the arm Tuesday as Google took it out of its invite-only phase to make it public and push into mobile. The newly opened-up social network now includes video chat Hangouts on phones: any active Hangout works in the same drop-in, drop-out approach as it does on the web with several at a time. Support already exists in the Android app (Android Market) and is coming soon for the iPhone app (App Store).
