(Sorry to respond to such an old item, but I just got the chance to look) I don't know what browser you're using, or if they're doing something to mask the URL

(Sorry to respond to such an old item, but I just got the chance to look) I don't know what browser you're using, or if they're doing something to mask the URL that they're using, but in IE7, the url IS updated on anchor fragments. The links themselves point to something canonical looking (e.g., like.fm/user/home), but when you actually click on it, the url you end up at is clearly implemented using anchor fragments (i.e., like.fm/#/user/home). For what it's worth, there's a bug in it on IE7, such that if I keep clicking the same link (even after I get there), it malforms, and keeps malforming with each click (though the pages still seem to work) -- like.fm/user/home#r//user//user//user//user/home