I'm sure people use Facebook, Twitter, and Myspace.
Hell there are others there. Well, of course there are WoW places like those. One is known as Avatar's United another one is one I have come to enjoy, Behind the MMO. A member of our Server has been working on this for awhile. Its becoming very interactive which is what I like.
Basic stuff such as blogs, photo albums and what not. You can also make a list of all the characters you play and have them show for others to see. Of course you need to verify them so people know its your character. Of course you get the basic "Has achieved XXX" and whatnot, but you can also post up You tube video links with a good streaming format.
While you cannot change the background or customize your page to your idea of style, its still being worked on and starting to really get good. Schoeps is on the staghelm server and very easy to get ahold of when it comes to the site. He is always looking for ways to improve, especially with the new Amory WoW brought out.
Overall, I like it. Still a few things that can be improved on (mainly being able to customize your own page) but its better than most other sites out there.