For everyone (like me) who doesn't know lisp or functional programming yet, I'm gunna have to heavily endorse this (http://www.defmacro.org/ramblings/fp.html) link that the "How To Learn Lisp" article gave. It's the first article that's helped me make sense of all the proselytizing going around about functional programming and continuations and currying and stuff. What it is, why it's useful, and how it's used... all laid out so I could understand it.
It's just a straight up must read.