A bit unrelated but if Facebook wants to make truckloads of money... I am still trying to figure out what the holdup is for an Adsense competitor -- I'd definitely try it on some of my content sites.
Most people browse the web logged into FB, so it doesn't seem THAT problematic from a technical standpoint. It also wouldn't be that out of place for me to start expecting ads based off of profile data.
Could you imagine how targeted the offsite ads could be? The marketer in me is already salivating over the concept.
I feel like I'm missing something incredibly obvious here.