There is huge proliferation of "social networking" sites these days: MySpace, Facebook, Linked In, Stumble, Wis.dm. First, let me clarify one thing: "social networking" = "trying to get laid." That's what we called it back in the days of Spark.com, Friendster, Nerve, and Parachat (all of which work, btw). That's why these sites are for 22-28 year olds, because so many people pair off after that.
Now, possibly because I am old, I find these sites insufferable. It's a lot small talk and terrible graphics. To compensate, I've created my own social networking site. It's called SeanZone and you should check it out. We've got billions of users already.
Also, if you are suffering from Internet-overload you can set your homepage to my news site.