I get the same kind of thing, but not aimed at iPhone apps-- rather, start-up ideas. My approach is to first ask people who their customers will be, and how th

I get the same kind of thing, but not aimed at iPhone apps-- rather, start-up ideas. My approach is to first ask people who their customers will be, and how they plan on selling to them-- and then, if they get past that, I'll hear what the idea is.