I'm kicking around the idea of creating an EFB style iPhone app. I know nothing about programming or the FAA requirements for an EFB. If anyone is familiar with either of these topics, let me know!
Well, if you're going to try to market it to the smaller GA crowd, you may have a winner. Part 91 doesn't specifically
require any charts on board. [Yes folks, I know the reg about having all information for the flight, but considering that Part 135 (and probably 121 but I'm not sure on that) specifically require aeronautical charts to be on board, you'd think it would be specifically spelled out...so spare me the debate.]
If you're looking to have an "acceptable" system for 135 operators, I don't think it'll catch on. Most operators going paperless are going completely
paperless. That means some kind of AFM, GOM, MEL, International and RVSM manuals, yadda yadda...Performance, manifest recording, yadda yadda...all electronic copies on the EFB. I don't think you'd be able to fit all of that on an iphone. Plus the sreen is pretty small.
Back to part 91. These guys http://www.anywheremap.com/anywheremap-pda.aspx
have had plates on pda's for a few years now. There's someone else that does it too, but I can't remember the company name. I had the other ones (the ones I can't remember) on my ipaq a while back (when I had an ipaq) and didn't care for it. But that's probably where I'd start.