Yesterday, Apple launched iTunes Ping, their new music social network. Part of that launch was a very basic implementation of Facebook Connect, simply to hook in and find out which of your Facebook friends were also using Ping. I tried it yesterday and it worked fine. But this morning the option vanished and everyone was left wondering what happened?Well, it vanished because Facebook started blocking iTunes Ping from accessing their API, we’ve heard (just as AllThingsD and New York Times have as well). Obviously, there’s no point in having a feature that doesn’t work — so Apple simply removed it.

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