i don't actually know what a webby is.. but well done!! ... Geek.
Been working on a site that has to be truly accessible to kids with a wide range of impairments (the site even has flash BSL videos of the text content!) - it was the decent real-world testing that dictated how we delt with the main of the accessibility issues. The resulting site wont win any awards for it's aesthetics and only passes basic w3c but is in on budget, actually works for it's purpose and is used... that is what matters to the client far far above any ticking any boxes.
being an old print hack working on the site has opened my eyes a bit to all this stuff.
imo w3c are guidelines... and good ones at that.. but not the rule and not infallible. Following them blindly without taking account for the real-word use of the site doesn't always work.