Have you heard about the IE7 Readiness Toolkit? My team and I installed it on our machines this morning.
Toolkit's purpose, "Use this toolkit to evaluate what's new in Internet Explorer 7 and find information and tools to help you test the compatibility of your sites, extensions, and applications with Internet Explorer 7."
I have seen in the news section a link to IEBlog "Details on our CSS changes for IE7" That looks pretty promising.
I have one question though... they said they fixed: "Parser bugs: * html, _property and /**/ comment bug " so it means that the hack * html will only work for IE6, and not in IE7, right? ... which is logical! Otherwise, the "old site" with the hack will then break.
Well so far, all the pages I have created are working like a charm in IE7.
It will be cool if they add Web Developper tools like in Firefox ... though if IE7 behaves more like Firefox it is not that important.