Hacking it is more interesting. Post a comment at Make, Nuts and Volts and/or any other electronics magazine forum starting with ‘I know that no one could actually do this, but it would really help me out if….’ and stand back. The best suggestion will probably involve a Ir receiver that drives a relay tapped into the shutter remote or the shutter drive unit themselves. It will most probably be free or cost only parts.

Good luck

I used to work for a toy company that had a wonderful product that should would be perfect for you (are you in the US or elsewhere?)

It was a voice recognition controlled power strip with two outlets. I don’t believe it’s out there anymore (at least in production) however Sensory was the name of the company that did the voice chip and Girl Tech was the name of the company that put it out. They’re now a part of Mattel, so I think it may be a buried piece of tech, however an eBay search may prove fruitful. I’ll keep my eyes peeled.