No, it isn't Google, but we have updated search on MSDN (and the rest of MSCOM).

Improvements include:

• Stronger weighting for titles and keywords:  this means that if you search for CreateWindow, the api reference for CreateWindow shows up first in the list.
• KB integration:  KB articles are now included in search results.
• UI improvements: we show all results by default, and let the user filter from there.  You can also modify your search from the top of the results page.

Check it out and let me know what you think.  I'm particularly interested in hearing about bad result sets and suggestions for our next round of features.