Nobody has posted here and I'm curious if this project is active.
I will be working on regiggering something to be a sort of myoelectric prosthetic. I don't have one yet as I'm still recovering, however I might as well think about how I could help the situation.
I found a great hobbyist website, Spark Fun. From them I ordered an Arduino for $32.
The Arduino is a n atmel microcontroller with a usb interface, allowing programming the chip and communication with the running program.
For myoelectric control, voltages would be derived from skin voltages. I'm no physiologist, but if some muscle activity can be discerned from the (low voltage) input, it could be used.
The PWM outputs are ready-made to control common servos, so a motor-operated claw could be controlled.
With the arduino's ability for independent operation as well as interfacing to the computer to revise the microcontroller's software and reprogram, it should be fairly straightforward to achieve a custom controller for a robotic claw of sorts.
Now, where do I get the claw (at a reasonable price)? Or, maybe it'd be better to custom design one?