Kind of related, http://channelurl.com/ -- the site only has those pages that are linked to. In other words, the content of a page is taken from its URL.
I think this is great. The page is basically a markdown viewer and the link has markdown encoded in it. If you pass the URL through a URL shortener, then the URL shortener is effectively hosting the content of your page. It would be cool if this was static HTML and the markdown was rendered in JS.
Example: a couple of Mark Twain quotes at
http://channelurl.com/show/1f8b080054c8525500036d90b16a04310...
Cheers