make proper alignment, some parts are misaligned. always use "padding" so it won't look like you've squeezed the contents to either left or right. I found a bug on your nav bar(or maybe its just on my pc), home sub links got stucked whenever I go point my cursor from Home going to Premium - maybe you should adjust the delay time for your sub links. the site look good and neat...
This may have been said already but: 1. What is this site? 2. How does it work? 3. How easy it is to use? 4. Can you guide me through it in 3-5 steps? 5. Is it secure? 6. What would I use it for? Once you answer the above questions I would recommend putting it into a short paragraph on the very first page to entice people to use the service. It looks like a really neat service, and good luck! Cheers,
Do you have a dedicated server? Because if you use a shared or a reseller of hostgator your site will get banned soon.