Hi Bill,
I was going to suggest, depending upon Matts interests, that perhaps
he could use a PIC or ATMEL device with analog inputs and roll his
own.
Most PIC models have 10 bits but some do have 12 bit. You could use
an external A/D for 12 bits or more.
I actually used this for a laboratory setup just recently, but I only
needed about 1% of accuracy. I bought a "Arduino Duemilanove" board
for *?25*. This includes a FDTI USB-to-serial and a Atmel AVR
microcontroller and is powered from USB. Their simple IDE speaks a
preprocessed version of C and it took me 5 minutes to have my
3-channel-analog-to-serial software done. You can also use your
conventional toolchain and just ignore their beginners' environment,
though.
http://arduino.cc/en/Main/ArduinoBoardDuemilanove
Chris
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