The ARRL has this site: http://www.hello-radio.org/
Wikipedia has an article: http://en.wikipedia.org/wiki/Amateur_Ra
QRZ has this site: http://www.qrz.com/i/ham-radio-howto.ht
Now You're Talking is a good book, kinda funny in places and certainly nowhere near as dry as the Amateur Extra study guide. The community doesn't really do the Internet thing too well, so it will take a bit of browsing to find something interesting... what you really need to do is find something in it that appeals to you, and then find places online or local clubs/people that do the same thing and hang out... getting a Tech class licence and a 2 meter radio helps this a bit because then you can just sit at home and talk to these people on repeaters and such.
There are things Im hoping to do, like putting together an engaging lesson strategy and materials, a wiki and such, but after speding alot of time on my current ham project it may be a while before something like that gets some flesh.
Anyhow, if your interested in ham radio and have questions, please reply with them and I will try to answer them, if I cant answer them, I will find someone who can.