I think you've answered my question, 8 ohms and 10,000 ohms for the driver and pickup respectively.
The other stuff is definitely just background, that I think is interesting. Basically what I am doing is developing an instrument with servos and solenoids that is capable of being controlled by a computer. The ebow was chosen as our attack mechanism as there aren't any moving parts and if this is an installation art piece, it needs to be able to run without breaking for a duration of time. The instrument will either be fretted by a series of solenoids, or a stepper motor with a glass slide on rails. I was going to use a piezo as a pickup. The whole thing will utilize and Arduino microcontroller as the brain. The idea is that I could make an instrument that "listens" and responds to ambient noise in some ways. If I developed 3-4 one stringed computer controlled instruments, then the instrument could form chords and I've just imagined that the sound of a slide moving up and down 3 different sustained strings in some sort of controlled algorithmic counter melody could be quite beautiful to listen to and to watch.
I'm new to electronics, but I'm a pretty technical person, so I'm not to worried about the challenge... just the amount of time its going to take.
What is your source of capaciters and all that stuff? I've been ordering stuff off of electronic goldmine, and I stopped by radio shack. Radioshack doesn't have much selection, and is expensive, EG is unpredictable and shipping is costly. Hopefully in 4 months time when i have a working prototype, I will have something to show you guys.