Well ... I had a look onto your website, but I didn't sign up. It's because your site looks just like every social network. I think it is quite similar to facebook, just for the first look.
If I should sign up to a social network, there had to be something special, something interesting which makes it unique compared to others. Unfortunately, none of your top selector links worked - except the "sign up". Maybe you should add a preview so that newbies are able to inform about it before using it. Though, it is just an experiment, this usual look of a social network doesn't give me the motivation to give my personal details (name).
Good luck,
electromoth