Like Tod said if you're not expecting to profit, just post it here or maybe pm a particular dev. If one of us think it's worthwhile, we'll do it.
If you want to make something from it, I would approach a publisher instead of a dev first. Chillingo is the only major (or only period?) publisher currently on the iPhone, and I trust them personally. You could try getting in touch with them and go from there.
Good luck, Nate