how does Facebook do Deep Linking in say their Photo Gallery pages?

I'm looking for开发者_运维知识库 a jQuery Rails deep linking solution...

Facebook has a great system as it doesn't have the ugly #s in the URL. Anyone know what they use and / or have any recommendations?

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Um... here's the address from the address bar after the second image of a gallery view:

http://www.facebook.com/SomeUser#!/photo.php?pid=someNum&fbid=anotherNum&op=1&o=global&view=global&subj=yetAnotherNum&id=andAnotherNum

Looks kind of hashy to me. You can't mod anything in location.href without triggering a new request unless it's part of an anchor following the # symbol.