I like what del.icio.us has done with their permalinks, if you can call them that. The pages you’d probably view most frequently on the site are the pages that belong to different people with their links on them. But if you click on the part of a link that says “saved by x other people,” you’ll get a page about the item everyone’s linking to. Here’s a good example, using Will Wright’s Spore demo on Google Video. On that page is a collection of everything those people said about that link, a list of who they are, and what tags they’ve given that link. I’m not sure how useful it is to see lots of “this is awesome!”, but I think somehow it provides some value if you’re trying to find something out about a page. If nothing else it demostrates the web-ness of the web. If there’s a value to being able to find out the metadata about pages, these sorts of things are where that value will start to emerge.