Before reading through this, I understood the concept. I understood expressiveness, no declarations, functions are data and data are functions, etc. I understand the concept and how side-effect free code creates wins, and even could see how this concept could be used for web programming.

But I'm not certain if I should keep plugging away with this tutorial, or if theres something better out there with Lisp or Scheme, and where my time is best spent.

Any tutorials that take a relaxed presentation style and try not to keep it completely mathematical (my CS set theory books bored the crap out of me and sometimes got very confusing), would be best.

Functional programming is something missing from my skill set and its beginning to bother me that I'm not slightly proficient in at least one good one.

Thanks guys!