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"We'd already heard whispers that Apple had to yank Facebook Connect integration from its new Ping music network because the connection was being denied by Facebook, and now Kara Swisher at All Things D  is confirming it -- and she's saying Facebook shut down access on  purpose after Apple used the find-your-friends API without permission.  Juicy! Here's the deal: Facebook's friend-finding API is generally open  access, but anyone that wants to hit it an extreme number of times has  to sign a deal agreeing to protect Facebook user data and limit network  impact. Given the sheer size of the iTunes customer base, it's no  surprise that Facebook wanted such a deal, but apparently negotiations  broke down -- possibly over what Steve Jobs referred to as \"onerous  terms\" -- and Apple decided to just go ahead and use the API anyway.  (Which, truth be told, is pretty in character  for Apple.) Facebook then blocked access, Apple had to scramble to  clean up all the Facebook references, and here we are. Only possibly not  for long: Swisher also says Apple and Facebook are still negotiating,  and Facebook Connect might eventually reappear in Ping. There is no word  when Ping might actually be useful or interesting, however."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2010/09/02/all-things-d-facebook-blocked-apples-ping-service-for-unauthor/>