I know that Scott Young tried this for computer science by utilizing resources on OCW. I am more interested in mathematics (pure and applied). I wondered how feasible to do the same thing for mathematics.
As for my background, I was in a much worse situation than Scott's. I received no formal education (primarily for financial reasons) since I was 19. English is not my native language. And I am 28 now and know very little mathematics (or at least according to my own standards). All I have is interest and determination. I worked as a computer programmer for the past years. Although MOOC was declared failure as revolution since it is criticized to be preaching to the converted, but it does benefit people like me a lot. I plan to apply to AMSS, a top mathematics graduate school in my country. The only good thing about the system in my country is that the entrance of a school is only determined by the entrance exam and interview. This means my lack of college education will have relatively little negative impact on me. The only thing I worry about is my age. I feel I am just too old to do anything great. Look at those wunderkinds who always achieve great things at young ages. However, five years ago, I audited for half a semester at Fudan university (a school famous for its mathematics program). I didn't find the average math students there are impressive. I was doing very well for that half semester and students there actually asked me for clarifying some concepts. Therefore, I do believe I have an aptitude for math. My goal is really humble and I just want to make a living by doing things I love.