Like most Apple stuff, you can install a default configuration pretty much by plugging it in and stepping through the setup wizard.
One thing that did take a long time to figure out: you can choose anything you want as your network password. HOWEVER, if you are going to have whinedoze lusers on the system, they will have to use the (28 digit?) WEP code instead of the password. The airport software generates the WEP code from the password that you selected, BUT to get one that's compatible with some whinedoze boxes, you have to choose a password with a certain number of characters (which I don't remember right now - 8?) Or just turn off security
Otherwise, some people can log on, others can't, and you can never figure out why
Also there was some fiddling around when setting up automatic time machine backups with multiple computers. The setup wizard handles the first one automatically, but you have to manually set up accounts or logins for subsequent machines. I didn't take notes, unfortunately, just fiddled with it until it worked.