CSS3 tabs for your webpage

I wanted a nice, almost 100% CSS styled layout for my Javascript tabs. So with the help of the CSS Gradient Generator I set about doing that. All the gradients and rounded edges are CSS3-based, with the exception of the gradients used by IE (PNGs generated by the aforementioned website). Please check out the demo, let me know what you think. I have a feeling some fixes will be necessary for IE6, but I'm getting there…

I am also struggling to add CSS3 drop shadows to the tabs. I'm not sure if there's a simple way to do it so the tabs don't overlap onto the area below the tab. If someone wants to take a swing at it, please let me know.