I am visiting microsoft site for some other purpose and microsoft greeted me with IE7 RC1 :)
Technology Overview: Internet Explorer 7 RC1
Internet Explorer 7 Release Candidate 1 (RC1) is intended to enable web developers, enthusiasts, and IT professionals to finalize their testing and ready their environments for the final availability of Internet Explorer 7. Read the Technology Overview to learn more.
Internet Explorer 7 RC1 (ia64)
Download the release candidate for the next version of the world's most popular Web browser.
Internet Explorer 7 RC1 (x64)
Internet Explorer 7 RC1 (Windows Server 2003 SP1)
Internet Explorer 7 RC1 (Windows XP SP2)