hi enrique,
i used Simple Message System for doing this. i didn't have the time to try pduino with wiring. it works nicely, but [comport] put many glitches in the dsp, so i use 2 instances of pd (one for comport with netsend, one for dsp with netreceive).
http://www.arduino.cc/playground/Code/SimpleMessageSystem
let me know if you need help, pat