You do not have an application identifier, but a page identifier.
i.e. http://graph.facebook.com/nike gives you:
{ "id": "15087023444", "name": "Nike", "picture": "http://profile.ak.fbcdn.net/hprofile-ak-snc4/373573_15087023444_171119216_s.jpg", "link": "http://www.facebook.com/nike", "likes": 5645333, "category": "Product/service", "website": "http://www.facebook.com/nike", "username": "nike", "description": "Nike | Facebook", "talking_about_count": 44336 }
For more information, refer to this link.
[EDIT]: Facebook api updated: you need an access token to receive data from this endpoint now.
Hadrien
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