HTML5 support is picking up in browsers, Safari and Chrome are definitely ahead of the pack with good support for CSS3 features like gradients, border-radius, transitions. Firefox4 is not bad either, just waiting for it to graduate from beta to production. I haven't played too much with IE9, one of the problems I have with IE9 is that it overwrites my existing IE8 installation. I decided to update this website to use CSS3 features and see how they work out in different browsers. I'm trying not to put any CSS hacks so this website will not render in its entirety on older browsers.