>Given the power of search engines, it’s possible the best URN format today would be a simple way for files to point to their former URLs. We could allow the search engines to index this information, and link us as appropriate:
<!-- On http://zack.is/history -->
<link rel="past-url" href="http://zackbloom.com/history.html">
<link rel="past-url" href="http://zack.is/history.html">
This seems like a heart-warmingly naive proposal; cross-domain search result hijacking.