As I was surfing through some articles I landed up in Engineering Windows 7 blog at http://blogs.msdn.com/e7.
Out of curiosity I thought of giving a try on Windows 8 blog, by replacing 7 with 8 and out of my surprise, they are already prepared for writing the blog. All thought it doesn’t contain any blog posts.
If you notice carefully, you will see that the title is <TBD> which is an abbreviation of “to be determined” or “to be defined”. So, my guess is Microsoft is already starting to work quite hard on Windows 8, but trying to remain quite by not disturbing the small brother – Windows 7 as much as it can.
I did try checking out for Windows 9 blog too, but no success. http://blogs.msdn.com/e9 returns with a 404 File or Directory not found error.