Nook Color by means of WiFi -- either on the same network or via a WiFi tether -- because the Nook Color is lacking in the standard usable Bluetooth department. After connecting the two devices, it makes a second link by running a TGPS server on the phone and a TGPS client on the Nook. The two devices are then intertwined in a blissful, all-you-can-GPS buffet of routes and roads. For the most part, the Nook's location-aware Android applications, such as Google Maps, will draw from this connection for location data and use it as if there were a GPS receiver on board. TetherGPS is up for grabs for $2.99 on the Android Market, and there's also a free "Lite" version for those who only need GPS for five minutes at a time -- we'll assume you know who you are.