Top Social Networking Sites(SMO sites)

These are top social media(networking) sites for SMO

http://www.ping.fm

http://www.facebook.com/

https://twitter.com/

http://www.linkedin.com/

http://www.myspace.com/

http://www.plurk.com

http://www.friendfeed.com/

http://www.tagged.com/

https://bitly.com/

http://www.youtube.com/

http://www.stumbleupon.com/

http://www.fanbox.com/

http://www.twitterons.com/

https://plus.google.com/