Hi Thank you very much for the list. Social networking websites are designed to allow members to connect and communicate with one another - so features of these sites foster interaction, activity, and of course, community.
Thank you for these list but i am not really sure about these. Currently, i am using Facebook, Linkedin, Twitter, StumbleUpon, Reddit and Digg for social networking. And also blog networking using blogcatalog and blogged.
Thanks for this great list of Social networking sites. But I think in the recent time Facbook, Twitter, Stumbleupon and Digg are the best sites to be used as social networking sites. These sites drive huge traffic if optimized well.