Nice work!
Seeing the thread above, I recalled a problem with node and serial port communication I ran into a couple of weeks ago.
It seems like node-serialport has some kind of issue on Mac OSX.
Reported here Problems installing on OSX 10.7.4 w/ Node 0.8.14 · Issue #111 · serialport/node-serialport · GitHub
Could that be lawm's problem?
Anders