[johnnydollar]

SICP, hands down. If you have some extra time you can watch the lectures on google video.

Paul Graham's ANSI Common Lisp is a useful supplement but it's not as entertaining as his essays.

If you're learning FP, you're learning AI. Peter Norvig's Paradigms of Artificial Intelligence Programming is the best book for applied FP.

Finally, the best way to learn Lisp is to write your own. It's the easiest language to write and in my opinion the only way to appreciate it.