Try visiting the chat room, for starters. I've noticed that I'm able to open up more in a chat room than even in a forum.
And my friends in the past have said that I'm a lot easier to talk to in things like an instant messenger program. Definitely take baby steps. When you've talked to someone online it makes it easier to talk to them in person, I think. Talking online can be a way of making a habit of talking to people.
But anyways...have you tried talking to a doctor? I don't know how bad your problem is but social anxiety/social phobia really is considered a medical problem, and there are doctors out there who are capable of helping people like you and me.