What's the alternative? It's not like FB is going to open up their social graph data so Google can use it to improve search results. I believe that issue was di

What's the alternative? It's not like FB is going to open up their social graph data so Google can use it to improve search results. I believe that issue was discussed when G+ results first showed up in search. For what it's worth, Facebook is also out there trying to compete on search using its social graph information, which is what the recent Zuckerberg announcements talked about.