The American Citizen Services in China finally did something quasi-useful: They've put up an information page for people interested in teaching English in China. Only about 20 years after Americans started coming to China to teach English. Well, better late than never.
Here's the link.
Honestly, I haven't read the whole thing in detail, but it looks fairly thorough, and I think I'll make it my new go-to link when people ask me for advice on teaching English in China.