The Engineering Windows 7 blog, or E7 for short, 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. So far, there have been eight posts, with titles like:

The idea is that the Windows 7 engineering team will have a central outlet for blogging to the Windows developer community. This blog will feature the men and women who have been planning, creating, refining, and promoting the next release of the Windows opperating system. And, of course, there is the opportunity for the community at large to comment about the content that gets promoted. We are such a large organization that I, too, am frankly looking forward to hearing what we have to say. Hopefully, most of the posts won't be news to me, but I am sure that there's a ton of good stuff happening in these halls that I am unaware of.

And I have to tell you, this blog is being done in earnest. To quote Steven and Jon (my emphasis):

The audience of enthusiasts, bloggers, and those that are the most passionate about Windows represent the folks we are dedicating this blog to. With this blog we’re opening up a two-way discussion about how we are making Windows 7. Windows has all the challenges of every large scale software project—picking features, designing them, developing them, and delivering them with high quality. Windows has an added challenge of doing so for an extraordinarily diverse set of customers. As a team and as individuals on the team we continue to be humbled by this responsibility.