Microsoft, Yahoo, Google, and Facebook: War of the Worlds II

IMHO, the biggest issue here is, that Microsoft and Yahoo do not possess search technology which can compete with Google. They may "explore the possibilities" as much as they want, but their technology is just lacking. I don't know how they will make up for it.

IMHO, what they need to do is to just invest crazily into search and try harder to compete with Google. Everything Google is doing is copy-able, they just need to throw more money and brains into it.