Hej,
I uploaded the following unfinished document by some of my students on how to connect some sensors and use them inside processing. I was waiting until they were done with it, but since you insist so much 
http://webzone.k3.mah.se/projects/arduino-workshop/projects/arduino_meets_processing/instructions/
Enjoy the sensors,
/David
PS. please note that some of the schematics are not accurate, yet