Hey,
I have x64 bit OS running on one of the builds you have on the bleeding edge.
I am not sure if my setup is fully functional.... but I get it to work most often and sometimes have to kill the java process manually to get it to release the serial port....
I'm having fun with this and learning a little more each day.
My question is how can I talk to the Arduino with a direct serial connection via realterm or equivalent terminal when running the arduinoserialbare.pde on the microcontroller.