This web archiving site has a list of supported websites. Anyone can request linksaver support for a website, and with enough requests, or with high popularity of the website, it would add support.
For supported websites, either a browser addon or, better, an extra js gadget given to the website developers, would allow users looking at the website content to request archiving of links.
For example: Halfbakery links would have a little "Save on LinkSaver" button next to them if they are not already archived, with the number of link saving requests on it. If enough people request it (say 3 for large volume websites, 10 for smaller ones) then it will be archived. Then a link from 2010 could still be available in 2013.-- pashute, May 12 2010 I expect this would work just as a browser plugin - no site modification required.
I also expect someone has baked this (or something just like it), but I don't know.-- phoenix, May 12 2010 Why do we need this over archive.org?-- jutta, May 12 2010 I don't get it... "Save" not good enough for you ?-- FlyingToaster, May 12 2010 random, halfbakery