The overall consensus is that Google has done some good work in avoiding where they have dropped the ball in previous efforts. Also some good work in creating a way to rapidly navigate through a series of people views. And a wonderful video tool that recalls the early days when we all gathered around campfires to shoot the breeze. The early threads are predictably self-referential, just as they have been for each new startup service at this point in the cycle. With Twitter, I lurked for months until the realtime communications bus provided an opening for Friendfeed. Still in that phase with Foursquare, which joins other iOS apps on the push notification bus as what effectively is one service to me.