DEFUNCT WEBSITES STILL AVAILABLE!
The "Wayback Machine" at archive.org keeps backup copies of popular websites going back many years. If you know the URL of a defunct website, you might find an old version on archive.org. Their archive is not searchable; you MUST know the URL for the dead website you're after. And here's a trick. To immediately display the archived copies, place this address in front of any URL:
         http://web.archive.org/web/*/