Part of what’s hard about social search is that Facebook prohibits outside crawlers. But Riley said he’s confident that he can get Facebook data, because he has gotten advice from Facebook CTO Bret Taylor, and has worked with Facebook’s legal team to make sure everything’s kosher.
This would seem to be a key point. Can anyone provide further details? Facebook hasn't historically shown much inclination to let others into the walled garden: http://petewarden.typepad.com/searchbrowser/2010/04/how-i-go...
Why would Facebook allow this?