Here's the beginnings of a direct RFID to USB converter. This should allow effortless integration between hardware and python scripts which will interface to a database.
On to the hardware, here's the start of the design, while it could be quite possible to have the ID20 interface directly with RS232 port via a resistor, I think USB will be more versatile. Not to mention leaving headers for TX RX on the FT232 will allow hooks for uC usb control later on for future projects. A description of the circuit will follow on the next update.