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> And the Facebook identity now extends beyond the walled garden. With Facebook Authentification, it's more like our online passport.

I can't remember any website that _required_ Facebook to log in, except maybe weekend hacks were other login methods were added later one. The online world may still have some freedom :)

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Like superted mentioned - Spotify is one example. There's plenty more. A friend of mine is building LikeBright.com - it's a unique concept for a dating app that exists as a layer on top of the Facebook.

FB auth is obviously a huge part of Facebook's extension beyond their walled garden, but there's plenty more examples. The fan-page widgets for social proof, Facebook Comments for publishers, and like-buttons are all areas of integration that solidify Facebook's lead.

It's not just a site, and it's growing into being more than just a platform. Already, Facebook's certainly beyond anything any historical precedents have set before.

Spotify comes to mind. Not a website though.

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