I had read that the D90 (and the D60) would at least have some ability to detect Eye-Fi cards when inserted and do something with them. LarryG over on the Eye-Fi forums has a little more explanation of what happens:
- In order to see the Eye-Fi Menu item in the D90, you will have to have an Eye-Fi Card inserted in the camera. The camera will then display the "Eye-Fi Upload" option in the Setup Menu between the "GPS" and "Firmware version" menu items.
- This new menu gives the user the option to enable or disable the Eye-Fi Card's ability to upload photos when inside the camera.
- In addition to the menu, the D90 will automatically provide power to the Eye-Fi Card when there are photo uploads pending or photos being uploaded. Once all uploads are completed, the camera reverts back to the user defined "Auto meter-off delay" power settings in the Custom Setting Menu.
However, this is still much ambiguity on the D90, especially on what impact turning off "Eye-Fi Upload" really has. The meter-off delay tuning is really useful and effectively allows the camera to have a completely smart timeout for powering off the card. On the camera's part this requires just being able to read the Eye-Fi card's status.
But, does "Eye-Fi Upload" actually disable the card's WiFi radio? Is that sufficient if I am, say, on an airplane where I can't use radios of any kind? Is the card's power consumption lower in this mode? The Eye-Fi card itself draws roughly as much power as the SLR itself, so will enabling this option double my battery life?