skibum - 2:49 am on Apr 16, 2012 (gmt 0)
It depends on whether or not Facebook can get people to think of search when they go to Facebook. If and it is a big IF Facebook can get people to share and search there the next problem would be integration and growth. Yahoo! got rid of all the search tech brains, it is not clear if MSFT has them and Facebook does not seem to.
MSFT does not seem to have the same vision as Google when it comes to search and I don't think Facebook would either. Should Facebook [stock] crater at some point after it goes public, could a bigger stake in Facebook now be a step toward trying to takeover Facebook?
The ability of MSFT to move in that direction would be highly dependent on whether Facebook creates what is essentially a private public company with voting power concentrated in a few hands as Google has done.