Microsoft is looking for beta testers to test IE8 beta. Currently the only way to directly file a bug with the IE Team is to be a part of the IE8 Technical Beta program on Microsoft Connect. The next beta version will be released sometime in August.
If you wish to be a part of making IE better by contributing great bug reports then you can email microsoft's IE team at IESO@microsoft.com and tell them a little about yourself including why you’d be a great beta tester.
Microsoft released the first beta of IE8 in March at its MIX 08 conference. The company plans to add more support for industry standard protocols, such as CSS (Cascading Style Sheets), in the browser and has responded to developer feedback that it needs to bring them in to test IE8 as much as possible so they can prepare Web sites for these changes.
Microsoft made IE 7, the current version of its browser, more standards compliant when it was released in October 2006. However, many Web sites that had been developed to work with older versions of IE that did not support open standards did not work on IE7 and had to be recoded. Microsoft hopes to avoid a similar problem with IE8.