Just thought I'd give you guys a heads up incase you wern't aware, someone over on the ubuntu forums wrote a program in java that changes the lights on your alienware laptop. It may work with the desktop's as well.
I'll just post a link to my build script and you can follow it from there:
Also, if you build HAL against libsmbios (from Dell) You'll get some bonus keys working as well, such as the eject key.
I love this new alienware M15X... It's a freaking beast of a laptop with 2 quad i7core procs....