How about Eye-Fi to iphone app communication over wifi network for obtaining geotaging info. I know that the iphone app cant connect to the eye-fi via adhoc. I'm talking about connecting both eye-fi and iphone to a wifi network and they having both of them communicate.
#1 I have an iphone but cant upload via adhoc to it from the eye-fi
#2 I have a verizon MiFi that I carry around. It lets me upload from anywhere, but no geotaging since it dosnt know its current location.
Solution - Both iphone app and eye-fi card connect to my MiFi network. Eye-Fi card requests GPS location from iphone and then does the upload.
I know that not everyone has a mifi they cary arround, but im sure there are a lot of people with iphones who would like to use its GPS for better geotagging accuracy.