I'm interested in doing more analysis and processing of web requests that generate 404 errors on our site. Is there a variable that can be captured in the ColdFusion code on my 404.cfm page that gets hit when a page is requested that doesn't exist? I tried doing a cfdump of CGI.REQUEST_URI in my 404.cfm page and then typed in a bogus URL on our site, but the cfdump returned the URL of the 404 page itself. I'd like to actually capture and document what pages are being requested which don't exist. How can I capture that info?