I like the colours...it's just abit plain at the moment (Not much we can review). Get rid of the "three latest templates" bit, it looks abit amatuer. Improve the navigation, get rid of the white lines.....engrave the dividers.
I think you should work on the logo/identity, it's very important to a site like this. If you're not good with building a brand logo, perhaps hire someone to help you. I think you should take a look at your competitors and see how their sites look,
www.boxedart.com www.templatemonster.com www.templatefreak.com get ideas from them and improve upon them.
Show us your design after more is done