the labyrinth called social bookmarking

i've just had a look at del.icio.us - hmmm interesting concept and i can certainly see the potential here for educational purposes. i like the way you can go into someone else's bookmarks to have alook at what they have stored. i dislike the way these online applications create an endless 'link' to something else equally endless in nature. that isn't what life is about! we're finite after all. i also still think the structure here for information storing and sharing is too sloppy and random. but of course i can see the enormous potential for the future in these things (it's early early days) - and libraries need to take not just notice but action.