http://www.quora.com/Joseph-Heavner/Posts/An-overview-of-Inter-universal-Teichm%C3%BCller-Theory-and-Shinichi-Mochizukis-proof-of-the-ABC-Conjecture-along-with-th
An overview of Inter-universal Teichmuller Theory and Shinichi Mochizuki's proof of the ABC Conjecture,
along with the current situation and how we can begin to understand this theory
Joseph Heavner 18 Aug, 2013

http://www.kurims.kyoto-u.ac.jp/~motizuki/
望月新一@数理研