Foldable Paper Toys -> ReadyMech

Via Coolhunting I have discovered ReadyMech. ReadyMech is a series of free printable papertoys that you can print out on your own printer and cut and fold. I made both skeletron and pink as an example.
This makes me think that printing on demand is very underutilized and can be expanded beyond these toys.
How about printable business card holders that you just upload your logo and it plasters it in the right spot for you to have a nice spot to have your business cards sitting on your desk?