Ooooh, nice skin. Very modern-looking, I like it. What I don't like is your category images (top and bottom). They just look very 'messy' to me and don't suit the style at all. Need something a bit 'cleaner' there maybe.
Postbit is nice, the postbit info in the boxes is very, very cliche. If you want to improve your style even further, do something else with the info.