Fri 01-Feb-13 01:23 AM | edited Fri 01-Feb-13 01:27 AM by tooslo
The Eye-Fi card at it's core operates just like any other SD card. You could transfer images with a cable or remove the card for use in a reader.
The wireless part is, of course, what set's it apart from a standard SD card. This feature automatically transfers an image to your PC or device. You compose this image using the camera's viewfinder or live-view, but after a few seconds can review the shot you just took using your device to judge how well the shot worked.
It has modes to do this at home/studio and in the field. Either of these modes also allow you to also upload to online storage or social media sites automatically. I don't use this feature so I can't say how that works.
This Eye-Fi solution, although limited, probably stands the best chance of working with your existing Nook.
The way I use it is raws go to CF and small jpgs go to Eye-Fi card for immediate review.