The community here is really creative. Since our work revolves around cheap cameras, a lot of great camera modifications and hacks show up.
One such hack was just featured on Hack A Day – a battery replacement hack by Marcos Kusnick and friends:
Using a syringe to trigger any camera, by jck57:
Book Scanner design has come a long way, too – page turning with air:
T-slot scanners by Translucent1: