Engineering Windows 7 is a blog that was started back in August. Form the first post

"Welcome to our first post on a new blog from Microsoft—the Engineering Windows 7 blog, or E7 for short. E7 is hosted by the two senior engineering managers for the Windows 7 product, Jon DeVaan and Steven Sinofsky. Jon and Steven, along with members of the engineering team will post, comment, and participate in this blog."

This blog contains a lot of very good information on various features and you can get a sense of how Microsoft makes decisions about Windows. I highly recommend reading this blog if you are interested in what is going on with the next version of the Windows. You can also make comments if you wish.