The City University Web Team has produced what they call an executive summary of the WCAG 2.0 in less than 100,000 words. It's a very well done summation of Web Content Accessibility Guidelines (WCAG) 2.0 that is significantly under 100,000 words. That's more than I can say about the original, which at least feels much longer than that. If you're trying to explain WCAG 2 to anyone, letting them read this would be a great place to start.