Wow, thanks for all of the suggestions!
Techylah: The problem with a USB Camera is that for proper confocal imaging, you need to get the brightness of a single pixel at a time -- something that I think the USB Camera would have trouble with.
In addition, I was actually thinking of using a Maple for this (for the additional processing power and a larger PWM range), but just wasn't sure how to handle getting a nice clean sawtooth out.
Do you think I'll need to add some sort of RC filter/Op Amp Buffer at the output to ensure that the sawtooth is nice and clean?
Thanks!
nathan