The site provides anonymous one-on-one chat with strangers around the world. I can see how just talking to people on that site might help with some approach anxiety in the sense that you can talk to strangers and practice keeping a conversation going. Sure its not the same as in real life but its a nice baby step.

However, I think its important to keep in mind that many of the people on that site might not act as they would in real life, so in that sense it might not be so helpful. Just a though.