Recently Google has new big project of social network against Facebook, yes! it's Google plus. And a cool feature is GG hang out which allow up to 10 people join conversation with webcamming. Just a new webcamming room.
How fast of internet connecttion we need?
Try to think, if we have transfer 10 streaming in the same time, it'll touch your bandwidth limit and make other people in your local area network serious. Hang out is now on test and should be improved.