I think Google has a bit of an upper hand here. They already have search data, so if they can combine that with the social data... Plus, I don't necessarily ha

I think Google has a bit of an upper hand here. They already have search data, so if they can combine that with the social data... Plus, I don't necessarily have all that much in common with my friends, but if Google can categorize me and say "oh, people with similar interests as you liked this", that's likely much more relevant. This isn't to say Facebook couldn't do something similar, I just feel like this is much more up Google's alley.