There are a couple of minor spelling mistakes in the copy ("professioanl" "requirments") that should be fixed in order to project a trustworthy image to visitors. The site looks fine, but is a little plain looking, so perhaps you could work on the design a bit. And you should have a call to action for users to sign up in the main content area, not just the small sidebar link. Also, it's necessary to have a clear marketing plan in place to attract the right types of visitors.