] very cool resource
Indeed. And something that ought to be memed but isn't.
The internet archive has old versions of much of the web cached, as well as a growing collection of public domain music, movies, and books. We've considered tying it into Memestreams so that when you are reading an article that was memed you can either go to the URL today, or you can go to the internet archive's cache at the time it was memed.
If you haven't checked this site out, you certainly should.
RE: Internet Archive