[Skrypt]

1) We handle this offline with the customer. The prototype 3D/2D editors we're developing right now should make it a lot easier in the future.

2) ai, eps, svg, png, jpg, pdf... anything really. But preferably vector graphics (will give best print resolution)

[kenrikm]

Awesome service and dead simple to use. I got 10 boxes made in no time at all. :-)