I second this, a dedicated hardware solution is going to be more reliable than a pc-based solution. Plus those Cocoontech forums are a wealth of information.
This was a technique used by fictional assassin John Rain in Barry Eisler's "Rain Fall".
The assassin got right up to his victim in the subway and placed a device that would trigger the pacemaker on a delay.
It seems like the open scripting would fit in great with these folks:
Unfortunately, I doubt the carriers would ever 'appreciate' this much freedom.
I can't answer my iPhone while wearing gloves. That's a glaring deficiency in my book because I wear gloves about 4 months of the year. Even then, I missed a week's worth of calls because the screen didn't register my swipe-to-answer. I'd be happy if I could just double-click the menu button to answer.
Have you looked at these gloves? http://www.180s.com/glovesforaddicts/ They've got a little nub that lets you actually use your phone while wearing them.
No amount of careful planning will ever replace dumb luck.