It’s been evident to me for some time that my iBook is caching the WEP Key for my home network, elsewhere than in my KeyChain; indeed my keychain can even be locked and yet my iBook will merrily reconnect to my home network when I get back frmo a day at the office.

Does anyone know (1) where the keys are cached, (2) if they are obscured in some way, (3) is this a generally-accessible, properly permissioned piece of information, and (4) does it apply to all networks, or merely the last-seen one?