Well I'm certainly very impressed!
The new IE7 RC1 is far better than the previous betas, http://www.microsoft.com/downloads/ check the downloads area for the most upto date links.
Then go across to Seth McLaughlin's Blog, http://blogs.msdn.com/ie/ and find the Quick Reference Sheet, which was here, http://blogs.msdn.com/ie/attachment/715071.ashx, when I looked last.
And, yes the new Partner Website (great job too) supports IE7 - so now there's no reason not to check it out.
Cheers, Gareth
(c)David Overton 2006-23