I don't think this is a half-bad idea, frankly. My thoughts/suggestions:
1. the hardest part here would be the GPS hardware component. Marketing and selling that would be expensive. Perhaps there is a way to track via existing devices? I don't know, I'm not up on my GPS tech.
2. I wouldn't even worry about the whole airplane thing anytime soon.
3. I could see this being really popular with couples/families. You could also link it to something where if the wife wants milk, she can tag it, and as the husband approaches a store selling milk, viola, text msg. telling hime to get milk. Pretty complex, but neat.
The technology exists already, small devices like that are used for example for tagging migrating birds and rare animals and tracking their paths. I'm more curious about the social/usability issues, whether people would voluntarily give up their privacy for something like that. Anyway, I'm not going to implement it tommorrow, I'm just kicking around different ideas.
As someone pointed out in comments, geotracing.com does a similar thing. And of course companies have done that for fleet tracking for a long time too.
1. the hardest part here would be the GPS hardware component. Marketing and selling that would be expensive. Perhaps there is a way to track via existing devices? I don't know, I'm not up on my GPS tech.
2. I wouldn't even worry about the whole airplane thing anytime soon.
3. I could see this being really popular with couples/families. You could also link it to something where if the wife wants milk, she can tag it, and as the husband approaches a store selling milk, viola, text msg. telling hime to get milk. Pretty complex, but neat.
Good luck to you.