M-241.: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints)
This small device does all it claims.  The only problem I had was not reading the instructions well enough to set the time on the GPS.  Once I decided it was probably smarter than me it was an easy set up.  I have not been out on a full day of shooting due to the weather and other personal issues, but I am excited to do so and perhaps this next weekend I can find more time.