Actually I am using the FEZ panda II and writing it is an SD card. The device will be mounted outside and be running for about a week recording data when vibrations exceed a certain range. I have a few problems that are mostly due to the hardware limitations.
Using analog sensors I was writing the data to a jagged array and then dumping the data when it reached a certain memory threshhold. The prblem is this was 250 x,y,z, time stamp data sets and far to little at 2kHz to be useful.
I decided to use digital sensors for 2 reasons: Less noise and the ability to have more sensors. My advisor want two sensors now and this means I2C as analog will not cut it. Unless I can find a board with 6 analog inputs.