It’s here, the fourth and final preview of IE9 (Beta coming next), on time, as promised. Web devs should be using this to test sites and to make sure they’re using mark up that flows for all browsers, if your creating a site now you should be testing with the IE9 preview. Why?
Performance is awesome, people want to use this browser. Heck people are even without an address bar!
The latest preview is at IEtestdrive