I don't have an iPhone (waiting for 4 ;/) and so I cannot give a proper review. But as a first impression I think there's to much clutter, you should think at a

I don't have an iPhone (waiting for 4 ;/) and so I cannot give a proper review. But as a first impression I think there's to much clutter, you should think at a better category organization, like putting "Top 10 a..z" in their own category as now important category are sinked and there's way to much to scroll, even on a PC. Also try a more subtle item gradient, it's too "eye catchy", just try to whiten more that grey (maybe make it fully white). And the site speed looks a little bit slower but this just might on my end so no real problems there. Good luck ;)