There might be some copyright problems involved with that proposal.
There is a partial solution, however. The Wayback Machine [http://www.archive.org/index.php] archives many web pages and their revisions. They have negotiates an exemption to the DMCA [http://www.archive.org/iathreads/post-view.php?id=82097], and so will probably be around for some time to come.
Jake
On Tue, 2007-01-02 at 05:33 -0800, zero 0000 wrote:
We allow web pages as sources under some reliability criteria, even though the web page might change or go away. We choose to live with this problem as a lesser evil than banning web sources altogether. But, I was wondering: could Wikipedia not keep its own archive of web pages used as sources? Or some such web pages? This is a minimally thought out proposal as you can tell!
Zero.