As you probably have noticed, we just re-launched our blog today as The Windows Blog sporting an all-new look and feel reflecting Windows in a broader sense instead of a single Windows release. We figured it was time to give our blog a good facelift (it’s looked the same since we originally launched in October of 2006) – especially as we start talking about Windows 7, Windows Live, and many other interesting Windows topics. Our old design focused strictly on Windows Vista. Our new design is no longer tied to a specific Windows release allowing us to talk about a wider range of topics.
With the previous site design – we essentially had 2 blogs hosted together on the same site: the Windows Vista Team Blog and Windows Experience Blog. But because of the design – not a lot of people noticed that there were actually 2 distinct blogs on our site.
We wanted to fix that.
In thinking about the design for The Windows Blog, we wanted the site to act like a community of blogs focused on talking about Windows.
Today – our new design reflects that.
As you can see in the left-hand navigation menu – The Windows Blog is currently home to 3 Windows blogs, 2 of which you already know.

Source- Windows Team Blog