Personally I think the design is a bit plain. Far too monotone.. when you've got a site dedicated to providing themes/skins/etc for anything really, I think you should also have a nicely designed layout for your own site.
The slider is nice but after that, the design seems to drop off. Basic font and colouring paired with grayness. And I think the hover of gray on gray is a bit hard to read. (The bottom "User Resources" and "Support Center"). Maybe making the hover the same blue used for links throughout the site