Test sketch for Sparkfun's RFID Evaluation Shield - 13.56MHz (https://www.sparkfun.com/products/10406).
Minor modifications to Aaron Weiss's original code (http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/ID/RFID_Eval_13_56MHz_v10.pde) to enable compatibility with Arduino 1.0 which now incorporates an implementation of NewSoftSerial.