Nikon GP-1 GPS Unit
Nikon sells the NIGP1 as a geotagging device. It comes with a 10 pin connector to transmit the data to D200, 300, 300s, 700, D2 and D3. However, when using this, the 10 pin connecter for the camera is occupied and does not allow you to use a Nikon MC30 or MC36 remote cord. However, this problem is easily solved. The Nikon remote cord for the D90, the NIMCDC2, can be plugged into a second port on the NIGP1 thus allowing you to take photos without touching the camera.
Note: Compatible models: D90 (via accessory terminal cable GP1-CA90), D3, D3S, D3X, D700, D300, D300S, D2X, D2XS, D2HS, D200, D5000 (via 10-pin remote terminal cable GP1-CA10). Some models may require an update to the latest version of firmware