I was a dropout, but I wish I had been a linguistics major! There was a post on Language Hat or Language Log where a professor recounted meeting a student who

I was a dropout, but I wish I had been a linguistics major! There was a post on Language Hat or Language Log where a professor recounted meeting a student who had linguistics "as a hobby", which was astonishing to the professor -- and the student explained that this was possible nowadays because of Wikipedia. (To which I could add, for some people because of the conlang community, or because of linguistics blogs!) Anyway, Wikipedia's coverage of linguistics topics is generally really excellent and detailed (maybe strongest in phonology, perhaps because of a few super-obsessed editors).