Throughout my undergraduate study, I only heard about Functional Programming but had never been deep inside it. Then, I had the chance to dive into it for one semester at RWTH Aachen: http://verify.rwth-aachen.de/fp09/. In short, the course was totally fun to get to know Functional Programming! Moreover, it improved my mathematical proficiency as well :-)

The given lecture materials are here: http://docs.google.com/leaf?id=0B66kEP2FWgm_YTRjYzYzYjUtOTA3NC00YTMzLWIz...

I archive my lecture notes here: http://docs.google.com/leaf?id=0B66kEP2FWgm_ZWJjYmJjNmItMDc4Yi00NjY1LTlk...