Arduino GPS Shield
Dexter Industries GPS Shield for the Arduino slides over the Arduino Duemilanove and provides GPS data to the Arduino.  Slide on and go outside! The Dexter Industries GPS Shield is powered by the SUP500F Receiver from Skytraq.  The receiver is a 65 channel, 10 Hz Receiver with a smart antenna built in. This all-in-one GPS receiver does not require any antennae. Serial interface is via 3V LVTTL.