If you are interested in news about Internet Explorer version 7, this entry from the IEBlog is interesting: IEBlog : Layout Complete Announced at MIX06. I noted the point about :hover on all elements. We recently talked about that at one of our meetings.
I also saw an article today that said that with Vista, Microsoft will end its practice of tying its internet browser together with Windows browser. You will be able to install version 7 as a standalone browser. (Isn't that what they said was not possible when Netscape dragged them into court?) The move should improve security.