Picked up an Eye-Fi Pro card and threw it in my S100 while I wait for the 5DM3. After watching a few marketing videos from Eye-Fi, my thoughts were to have the EyeFi sync with my iPad and display the JPGs generated near realtime for things like studio headshot work. Figured I could give clients some assurance/feedback as the shoot progressed rather than stopping to show the back of my camera.
Just so you all know, even with the 12.1mp S100 jpgs, the transfer rate is pretty damn slow, even on my home network wifi. It seemed to take between 30 and 45 seconds per image. After a few images the pipeline seemed to stop, and I had to restart the S100 and iPad2 app a few times to get it going again.
It was my first time playing with it all, so maybe I noobed it up, but my experience with it so far is a little less encouraging for those purposes.
Hell, it's still incredible, just nowhere close to realtime.