Hi,
Firstly, I must say the idea of the site is really nice. I have seen your site and found some important changes that are needed in it. No doubt that some of the features provided by you are really awesome. But, still from UI as well as some functionality point of view, some changes must be made. I can send you a detailed report regarding the changes needed and also suggestions for the whole site. So, looking forward for a positive response from your side.