There are a lot of changes happening over on Microsoft’s employee blogs. Josh Ledgard has a good list.
The blogs are now in two places:
1) Developer and Tech-oriented blogs are at http://blogs.msdn.com.
2) IT oriented blogs are at http://blogs.technet.com.
You can use the Microsoft Community Blog portal to find an employee blog.
And, of course, there are hundreds of employee blogs off on independent sites like mine (even those employees who have their own domains can be listed on the Community Blog portal).
Update: I left out the French Microsoft blogs, which are at http://blogs.microsoft.fr/.
Gerade das Community Portal ist gelungen, denn dort kann man in verschiedenen Kategorien auch suchen.