Advanced Functional Programming
Not a MOOC but a course being taught in the Spring of 2014 by Patrik Jansson at Chalmers.
However, there is a wealth of materials, slides, code, reading assignments, Haskell specific search engines and other goodies at the course site.
Requires more than the usual amount of self-discipline but the materials you need are present. Success only requires you.
I first saw this in a tweet by Patrik Jansson.