The best description of functional programming ever, from Adam Vandenberg, mixed in with a rant about CGI programming.
Will some data into existence. Now operate on that data with a massively nested function call, and be sure to include some mutually recursive calls.
Somehow it's not as funny on its own... he was comparing different programming styles, so there was some build-up 
It's probably on his mind since he blogged Advanced Programming Language Design by Raphael Finkel. (Wow, this link floated around a lot... I love following links like this. From here to here (the author was actually Dave Winer's teacher!), to here to Adam). The entire text of the book is online, and it looks like a neat book.
This is one of the links I meant to blog when I wasn't blogging 
Feel free to post a comment below. Please see my comment policy.
Formatting Rules (No HTML):