Google goes Business & Social Media Networking
http://blog.wired.com/business/2007/10/opensocial-goog.html
First, there are the "hosts," who are essentially a group of participating social networks. Google wisely dipped into Facebook's pool of competitors by nabbing Hi5, Plaxo, LinkedIn, Orkut, Ning, SalesForce, Friendster, Viadeo, and Oracle right out the gate.