1 Internet Explorer 9 Platform Preview Released[Article] on 21st March 2010, 9:58 am
The Preview of IE9 scored 578/578 on their CSS3 Selectors Test
You can read more on the Internet Explorer blog
I wished that Microsoft good luck at this as they will need a lot of it. Now if they can just make a script to work in IE6 and require all users to upgrade that would make me happy.
You can watch this Video: Browse the internet using IE9 Platform Preview here