I for one love the SD card update as my laptop has an SD card slot. I can really see an advantage here if I had two SD cards. One stays in the ifly and the other goes home to be updated before a flight. You could simply swap the cards before the flight and take the older version back home.
I understand that the folks that provided the streets program might object to their program being on two cards but surely there is a way to get around that as very few of us have two iFly 's.
This is also a great segue into a pc based flight planning module that would let you do the major planning on your PC so the gps could be left in the aircraft.
Add the ability to file your ifr flight plan and you have all the bases covered.
The sky is the limit with this device and thanks for your tireless efforts to maintain the best gps out there for us owners.