One of the Vista team in the US went to the trouble of creating a list of Microsoft team blogs - meaning those in the product groups in the US building our products. If interesting then please go back to the list as I am sure this will get updated regularly.
Listing as at Sept 17th 2007:
"Listed below are official team blogs from the product teams at Microsoft which are categorized by specific product groups.
Click here to access the Microsoft Feeds Directory where you can also choose to search for a specific blog you are looking for that isn't listed below.Microsoft, Blog
Source:→ MSDN Blogs