Rebranding

So for my first GRDS Studio 1  project we have to do a little logo research, good and bad logos and what makes them good or bad.  I came across the Microsoft Advertising Awards and was wowed by their logo and campaigning!
This is the before and after logo:

These are some of the campaigns:

I am so glad Microsoft decided to redesign, their new solution is so much better!
Here is the article I found: http://www.underconsideration.com/brandnew/archives/the_roaring_mouse.php

EOM