Facebook's "one more thing" at today's Graph Search press conference? A search partnership with Bing. Naturally, Google was the elephant in the room after such an announcement, particularly in light of the fact that Lars Rasmussen has strong ties to the company by way of his connection to Maps and Wave. Asked why he opted not to take his business to Mountain View, Zuck told the crowd,
The main thing is that when people share something on Facebook, we want to give them the ability to broadcast things, but also retract them later, and have them be removed immediately. Microsoft was more willing to do things specific to Facebook.
We've reached out to Google to get its side of the story. We'll let you know what we hear.