I've been working on a few updates to our Arduino GPS Shield.
First: we have a new set of GPS Libraries. They're located here: http://dexterindustries.com/Arduino-GPS_Shield.html
Next: I did a quick post about how to convert GPS coordinates from GPS format into decimal-degrees. There is example code that's (mildly) documented: Arduino GPS Project GPS Coordinates Conversion Code
Finally: We have a great new color and design: