i'm trying to do the same. i was initally using the capsense code but abandoned it because i couldn't seem to create multiply capacitive sensors from it. i'm not that hardcore a programmer you see.
instead, i found this code http://www.arduino.cc/playground/Code/CapacitiveSensor
which works perfectly in arduino, the numbers are outputting and i'm trying to use with the arduino2max patch but no joy. as the pins are declared in the arduino code, surely the max patch should read the digital pins? any help is really appreciated.