Over 30 people are currently outfitted with ProDigits, bionic fingers that can actually grab and pick up objects in a way that previous prostheses couldn't. You've got to see these in action.
ProDigits can be controlled two ways: by myoelectric sensors that register muscle signals from the palm or the remnant finger, or by a pressure sensitive switch from a force resistive sensor. The degree of functionality they give back to people is truly incredible, as you can see in the video below (patient demonstrations start at 1:18).
We at Gizmodo have been known to have a soft spot for all things cybernetic, but it's especially cool and gratifying to see technology used to help people get their normal lives back. [Touch Bionics via Slashgear]