A simple question:
Would you play $3-SNGs on your iPhone, e.g. while you're on your way to work, in a boring lecture or as an enrichment of your lunch?
Ideally, it would be connected to a normal poker room so you could use your account - and fishes could just deposit while playing through their telephone bill.
The interface should be perfect do display one table - and luckily the controls would be pretty simple.
Added question: could you imagine that it would bring new people to poker because the entry barrier would be lower and it would be a great pastime e.g. for commuters?