I just noticed this ad on SO. I thought Microsoft had some bias against advertising on SO.
Microsoft seems to consider StackOverflow to be a VERY GOOD THING, because it helps their users and developers find answers without costing them anything. One of the ways they show this is by counting SO participation when giving out MVP awards.
In fact, MSDN searches are now even returning Stack Overflow results.
I think that's awesome. Sometimes imitation is the sincerest form of flattery, but sometimes just acknowledging someone else does it better is an even stronger form of praise.
Here is the likely source for your thoughts:
Read down near the end where he quotes their "ad guy", Alex Papadimoulis. Then read Alex' response to my comment on his answer here for clarification: