Has anyone seen an aftermarket system for keyless entry and startup? What I'm after is something along the lines of Merc's effort: a small RFID-style device you keep on your keyring or in your pocket, which if it's within a few feet of the car unlocks and disarms it, so you can start the car with a button press. Anyone seen one? Someone *must* have come up with one of these, but googling just gives bog standard remote unlock alarms....
Ric