This is a fantastic video interview with Trey Ratcliff of Stuck in Customs. If you have any question as to whether Google+ is good for photographers or not? Possibly this can answer some questions for you.
** P.S. If you attended my speaking engagement at Social Media Camp, on iPhoneography, Trey Ratcliff is the developer of one of my favorite (and most used) iPhone photography apps, 100 cameras in 1, which I mentioned at my talk.