Hulu's a very dangerous commodity for whoever buys them. Once sold away by NBC, Fox, and Disney, they'll also lose the exclusive contracts they have with those networks, in which case the only real service they're providing is ad-sourcing. Fox et al were trying to hike up Hulu's content licensing rates dramatically before selling them was even a discussion. No way Hulu will keep the same advantaged deals after a split.

Makes sense for Google just like DoubleClick did, but Hulu's platform is in jeopardy.