Google+ features like Hangouts — which allow you to video chat with multiple people at once — help to give the new service its own unique feel, separating it from Facebook. Millions of users have been flocking to the network and voicing their varied opinions on how well it compares to its main competitor. Amongst my 150 or so Google+ contacts, the consensus is mostly positive, and a greater influx of users is sure to breathe even more life into the fledgling social hotspot.
http://news.yahoo.com/blogs/technology-blog/google-hit-10-000-000-users-today-could-150745760.html