There's a new eBook on the market that goes into detail about pretty much everything. The author doesn't really condone hacking at all, its just that he shows the basics of scanning and how to test to see if "your" network is vulnerable or not.
Anyways, it's prolly a great piece to start off with if you're new to the wireless community, and you get a bunch of other free stuff with it too. It's going for $20 (which is worth what you learn, to me) and he's doing an affiliation thing...50%. So if you have a cool website or something, you can make $10 a pop i guess.
Here's the site:
http://www.hackandsecure.com
that's my 2 cents
. kraix .