The Wayback Machine
If you have ever 'lost' a page that was a valid link.
1. Try to get the listing using google and then hit the 'cache' button - works when server may be down temporarily.
2. If the website has gone - use the Wayback Machine. This has always been effective for me. Finding the Wayback Machine can be a bit tough at times though. THIS IS A VALID LINK.
So if you have ever lost a site like 'the terrorists handbook' or 'oneseedling' you can use this site to view/review them.