Here I am in all too familiar predicament; I have access to the configs of my AP, but I can't find any documentation as to what the wep or wpa key is.
I don't want to change the key since there are currently some webcams and printers on the wireless network. So I took the config and googled Cisco Type 7 password decrypter and found quite a few places to go paste my key into, and viola, I got my key
Enjoy