I have yet to get around to it, but one day I’ll remove my normal door lock in favor of a fingerprint reader or some sort of keyless entry. Until that time I’ll just suffer the burden of carrying around a set of keys. Nate on the other hand isn’t so patient. He’s managed to eliminate most keys from his life with the exception of his car key. So what did he do? Hacked together a Nike+iPod device and key fob, with an Arduino Pro Mini, to create what he calls the iFOB. Now just walking within proximity of his car unlocks his doors. Unfortunately, starting his car still requires a physical key.