Perhaps the article Class field theory summarized (Rocky Mt. J. Math. 11, 195-225 (1981)) by Dennis Garbanati should be contained in such a list as a very accessible introduction. For those who can read German, both Hasse's Marburg lectures and Deuring's notes from Goettingen are excellent. Neukirch's cohomological approach (Klassenkoerpertheorie in regenbogen's list) will be translated into English this year.
Edit: I am a little bit reluctant to put this link here as I can't access this web page anymore; but a couple of links are still working, and google will probably find the rest.
