Check out the Cross-browser Test Results Summary for Internet Explorer 9. Take the IE 9 Test Drive, and then see Solutions for Virtualizing Internet Explorer to learn how to create a virtual operating environment in which you can run earlier versions of IE.
The Microsoft Desktop player allows IT professionals to access technical content (videos, webcasts, podcasts, white papers, and more) and links to resources (such as IT evangelists, local training opportunities, and local user groups) in your area. You can either view it online or download the WPF application to view offline.