I'm currently making progress through Information Theory (http://videolectures.net/course_information_theory_pattern_recognition/) and I'm considering trying the upcoming Coursera course on Discrete Optimization (https://www.coursera.org/course/optimization) or the one on scientific computing (https://www.coursera.org/course/scicomp), though I'd prefer the latter. I'm open to studying just about any quantitative topic, though - name a MOOC or subject and ask me if I'm interested.