Yahoo! and Google, should they merge?

[on184]

I believe Yahoo! has the better email service than Google, however, Google's search is the winner hands down. I believe Google and Yahoo! should merge certain aspects of their company's together to create an online company the world has never seen before. If Google and Yahoo! were to combine companies what services do you think the company would keep? (Keep in mind that both, Yahoo! and Google, have basically the same services like email and search, but which service would they keep and which service would they trash.)
Other than their being less competition, because Google and Yahoo! will still face Microsoft as a competitor what services should they combine if they were to merge?
Knowing that they won't ever truly merge, this question is theoretical question of what would happen if they did merge and Microsoft was able to provide strong competition.