The first beta Internet Explorer 8 is coming soon as this email from the Internet Explorer 8 Team suggests – its an opportunity to download Windows Internet Explorer 8 Beta 1 but for select users (MSDN, TechNet subscribers ?):

"We are nearing the launch of Windows Internet Explorer 8 Beta 1 and we will be making it available for the general public to download and test. IE8 Beta 1 is focused on the developer community, with the goal of gaining valuable feedback to improve Internet Explorer 8 during the development process.

Participation in the Technical Beta will enable you to evaluate a common release of Windows Internet Explorer 8, the ability to submit feedback, post bug reports, download software answer surveys on product quality as well as vote on top bugs filed by others from the technical beta program. This is a very exclusive program, by invitation only. The only way to submit feedback is to enroll in the Windows Internet Explorer 8 Technical Beta program. "