del.icio.us is an interesting pre alpha project on social bookmarks where the path is the interface. I am not sure I get it, but my intuition is that this could be a much better way to handle links if the work of entering them isn’t too cumbersome.
For an article on it at the O’Reilly XML.com site see, XML.com: Introducing del.icio.us. I love the domain name! This is courtesy of Matt P.