I have written some c# test software for the 28340 Parallax USB RFID. Hope it might be useful to other developers.
The user has to do nothing for configuration. The FTDI driver does it all. Just attach the 28340 to a USB port after installing my software and that is all. This is about as simple as it gets.
Welcome to the RobotShop Forum. We certainly appreciate when users create applications for the products we offer and make them open to the general public. We hope you get positive feedback and the community appreciates your efforts.