Keyless locks arenít new. Neither is RFID (Radio Frequency Identification). But put the two together and well, thatís a house of a different color. The Gadget Home has come up with just such a systemóthe Gateman MX540. It replaces your standard metal key with a card or chip that you can keep in your wallet, purse, or cell phone. No fumbling necessary, just approach the Gateman lock and you will be identified as friend, not foe. The product also sports a forced lock mode, an emergency power supply, and even a heat sensor that automatically unlocks the door while sounding an 80 dB alarm. Prices start at around $650, available now.