Facebook and LinkedIn now appear to be exchanging subscriber information, as I just received a Facebook email suggesting that I friend two business associates. The only way Facebook could know I have any relationship with these people is if Facebook had access to LinkedIn subscribers. I only use Facebook for close family and a few friends, so Facebook could not have made the connection with these people (one of whom is in Asia) by doing a second and third degree of separation search. While the NSA data collection is troubling, we need to keep in mind that all the "free" services like Facebook and LinkedIn are "free" only because we give them permission to sell/give away/distribute our personal information. Anyone who complains that Facebook is giving personal information to the NSA is forgetting that you already gave them permission to do that when you asked for a "free" subscription.