With regard to the information that we provide to advertisers, again, there's no information specific to individuals in an identifiable way. I'm aware that there are some advertisers who have a practice of linking up this information. We do provide some analytics in a general way across large groups of people about off-line purchasing behaviour, and that's something we've talked about on our privacy page and we've explained to people how we do that in a privacy-sensitive way.
With regard to the entities that are able to receive information on Facebook, we have agreements with them that restrict their ability to leverage the information and use it in ways that we're not authorized on.