I just found out about two really cool and interesting MOOC classes. For those of you interested in digital currencies and/or cryptography these are two introductory courses you should sign up for! I am currently in both and waiting for one of them to start. The Cryptography class at Stanford has already started but you can possibly still get in as long as you don't wait too long. The Digital Currency class doesn't start till May 15th.
MOOC Stanford Cryptography I <http://online.stanford.edu/course/cryptography>
MOOC University of Nicosia Digital Currency DFIN-511 <http://digitalcurrency.unic.ac.cy/free-introductory-mooc>