To some this may seem like a silly question but my Mum taught me that the only silly questions are the questions you didn't ask, so here goes.
The resolution for an iPad is 1024 x 768. For the sharpest result is it best to make my graphics fit that exact resolution or is it better to double the resolution and let C2 scale it? (In either case I'll be using pixel rounding.) The reason I ask is because the game creator I've since left used to benefit from using larger pictures.
Also, what is a good DPI for crisp graphics? I know 72 will look nice, but what's generally considered a value that provides a good balance of crispness and performance?