Pronunciation is one of those skills that a lot of teachers know that they should do, but they don't. Sometimes it's because they're not sure themselves of how it works; sometimes, pronunciation doesn't fall in neatly with a subject; and, unfortunately, there are teachers who just don't think it's important.
Those of you who have had class with me have probably suffered...er, studied...pronunciation. For those of you who don't have a lot of experience with pronunciation, or who would like to practice on your own, check out Isaiah Woo's Listening, Speaking and Pronunciation class. While MIT hasn't put the complete course online, you'll get a lot from the video exercises (which are also available through YouTube.)