Interestingly enough, this is actually gone in browsers that implement the HTML5 History API: http://www.facebook.com/note.php?note_id=438532093919 http://www.f

Interestingly enough, this is actually gone in browsers that implement the HTML5 History API: http://www.facebook.com/note.php?note_id=438532093919 http://www.facebook.com/note.php?note_id=438532093919 For instance, use Chrome and browse around the site. You'll notice there are no hashed URLs. The same thing is done on Flickr. Look at this page: http://www.flickr.com/photos/timdorr/3707685058/in/set-72157611340609280/ http://www.flickr.com/photos/timdorr/3707685058/in/set-72157... Now click on the sections under "This photo belongs to". As you expand them out, you'll notice that the URL in your address bar changes. This is particularly useful in Flickr because you can use the arrow keys to navigate through photos. And when you link to a page, your personal state might have been browsing through a set instead of a full photostream. This keeps the state intact when sending links to other people. It's a great usability feature.