I’ve been ‘on’ Google+ for a while now but it’s something I personally tend to dip in and out of. I’ve not yet found the daily value for my day-to-day but I’m willing to give it more of a chance! I’ve actually just registered to be part of a hangout with NASA (thank you Steve D) … will let you know how it goes!
For brands and businesses, if your demographic is skewed male and tech-minded then this is the happening place to be! I’ve read some good case studies of Google+ for phone companies and trades and B2B where the use of circles and hangouts can add a layer of depth to your online connections.