IEBlog: If you’re a developer, an IT Pro, or just plain interested, please visit http://www.microsoft.com/windows/ie/ie7/ to try the IE7 Beta 2 Preview.
Dave Winer: This release is significant for publishers who provide RSS 2.0 feeds for their content because this is the first Microsoft release that includes comprehensive support for RSS
http://www.microsoft.com/windows/ie/ie7/
Randy: Download, install, play.
Initial Thoughts: Hung and crashed after about 1 minute. Definately has Web 2.0 attributes.