I know you're out there. And you too, Eve. I know you're not a statistician, but every other post on your blog contains the word 'regression'.
Anyhow, this will be right up your alley (via the Consumerist). Although, did he use Excel?? Oh, no he DIN'T.
(Actually, it might be Prism, not Excel)
Basically, this is 'how to commute effectively for nerds'.