If you're interested in a tech preview of IE9 you can check it out here at Microsoft's IE site.
It provides some demo tests of current technologies being integrated into IE. Among them are SVG, Javascript improvements, multi-core JS support, SVG + JS, HTML5, CSS 3, and more.
The CSS 3 support is still only at 55/100 but it's still not bad for a preview. You can also compare a few of the tests in your own browser as well or compare them in IE8. I did a little comparison in IE8 and the difference is remarkable.