If you can code it for Macs then possibly an iPhone app would be the next move? I've just downloaded a program for my iPhone called copilot for £12 which has 10% of the features SkyAngel has. You could price it double that of copilot, make an absolute killing and I'd be your first customer!
I love it, I'm still trying to work it all out but at first impression, I'm extremely impressed.
