It's a little bit crazy that all the responsibility of preserving this data resides with the Archive Team[1] and the Internet Archive[2].
It's really easy to set up and I would encourage anyone remotely interested to give it a try. More info & download: http://www.archiveteam.org/index.php?title=ArchiveTeam_Warri...
Internet Properties: Don't be a dick. If you're closing up shop, bundle the site up (public portion, not personal info), and ship it off to the Internet Archive.