A couple of months ago Communities.com removed "An Introduction To Capability Based Security" from its Web site. Over the weekend I reposted it, with a new overview page, at
http://www.skyhunter.com/marcs/capabilityIntro/index.html
Among other things, new overview page describes the Godzilla-like battle, "Melissa versus CapZilla", in which I describe what would have happened to the famous Melissa virus in a capability world. I know that this is a powerful example because, when I have used this example at the local community college, I have gotten a rather amazing reaction: a roomful of eyes that are alight with understanding. This happens rarely enough when teaching that you notice it :-)
--marcs