I find the sources of ExtJS nice to read. They have an OOP approach.

I'd really like to see some functional-style JS code.

[ background : I've used OOP a lot, and thought it was the ultimate, until I discovered lisp... ]

Hmm.. How about the ADsafe code - http://www.adsafe.org/adsafe.js

by Douglas Crockford, author of 'JavaScript : the good parts' - http://www.crockford.com/