You need a tagline that explains what the site is and differentiates in from competitors. I would also nix the advertising. For a new site with little traffic it won't make you much money and undermines your brand. I think you'll also find most of your revenue comes from affiliate commissions related to the products you feature. Send your traffic away via ads will probably reduce your revenue.

I would also remove all the bookmark buttons under the items. Those sites aren't really reception to the type of content you have for the most part and power users are quite capable of submitting on their own.

That said I really like the layout and think it's a great idea for a site. If you put effort in more editorial blog style content surrounding the products, you could generate quite a following.