Electronics: GPS

Geocaching
Geocaching is a high-tech treasure hunting game played throughout the world by adventure seekers equipped with GPS devices.
http://www.geocaching.com/

GPS Navigation Watch
The Latest and the Best News, Infos, Reviews, Rankings and User Guides about GPS Navigation Systems.
http://www.gps-navigation-watch.com/

Maps GPS Info.com
Information and resources relating to maps and GPS. Includes product reviews and a maps/GPS glossary.
http://www.maps-gps-info.com/

TomTomForums.com
TomTom & GPS Navigation Community
http://www.tomtomforums.com/