Google failed at "Shopping", failed at "Video" (read youtube acquisition), failed at "Buzz", failed at "Wave" and I'm sure there are others that I'm leaving off. What google does is Ad's and search, that's their bread and butter.<p>It's very hard for big companies to venture off and do something out of their comfort zone. Facebook failed at "Marketplace". And you'd think that Facebook would be poised to take over that space, but still struggled.<p>Google is more poised to bite off of Linkedin's social graph, rather than Facebook's. IMO Though, with the right hire's Google can do it.