Share and discover what’s happening right now, anywhere in the world. Twitter is a micro-blogging service that enables its users to send and read messages known as tweets. http://twitter.com/Multikeys
Giving people the power to share and make the world more open and connected. Facebook helps you connect and share with the people in your life.
Friendster helps you stay connected with everything that matters to you: friends, family and fun! It's free to join, see what all the fuss is about!
Control your professional identity online. Over 55 million professionals use LinkedIn to exchange information, ideas and opportunities.
Find friends, family and people with common backgrounds on MySpace. Make new friends and find some old ones.