Here's my version so far.. also has the DallasTemp stuffs saltydogaqua posted for me
My fixture's going to be a 3 piece heatsink, so I'm using 3 temp sensors. "This" controller's just for the light.. not enough memory or pins for much more. Will be making a second controller for everything else.
http://www.mediafire.com/?cvv3q8zn29wkhi5