Skype is an Instant messaging program that lets you keep in touch with your friends and see if they're online. Send them a message with the click of a button and find out more about them by reading their profile. also lets you make voice calls to your friends.
Sounds like a social networking site, doesn't it? Skype is not currently considered a social networking site, they're just an IM. Tom Keating, of the VoIP & Gadgets Blog thinks that it's about time Skype do something about this and become a full fledged social networking site.
Why not? After all, they already have the database of people and the friend's lists, not to mention simple profiles. With just a little more work, they could be bigger than Facebook.