Windows 7
Back in June I had mentioned about Windows 7 and that there is lack of information and a changed stance from Microsoft. If you haven't noticed, there is now a blog (about a month now) by the Windows 7 team called Engineering Windows 7. The likes of Jon DeVaan and Steven Sinofsky, along with other team members blog here.
If you want to know what goes behind creating something like a Windows operating system, this will give you a good perpective.
