I also test rode the Elf and wondered why there was no follow-up on this delivery? There is also an owners site from around the world at http://elfowners.webs.com/ if you want more info. on from actual owners.
Best Folding Electric Bike for Transport on International Passenger Flights:
So far only the NYCeWheels electrified Brompton for International Air Travel fits into this category. Does it have any competition? That would be a win by default.