Ask HN: skills to look for in young iphone/ipad programmer?

I'm looking to hire an iphone/ipad developer here in Colombia. I want someone young in university, not a full timer. I'll pay them a decent wage, lend them ipad/iphones, pay for their developer status etc.

I don't think it'll be easy to find someone with actual iphone/ipad experience, so my question is, what kind of development experience should I look for that means that this person can fairly easily learn/pick up ipad development? I can evaluate some level of technicality/programmerness, but not C++, for example.