Since George designed these great little boards for his older Toyota, I thought I'd give one a try in my shiny new Rav4EV. I bought the raw "built" board, and supplied my own emitter, heat sink and connectors. Turns out that his turn-key units would have worked better and saved me time - but where's the challenge in that?
Check out George's page for his automotive driver boards here: Dome light drivers. while they're a bit big for flashlight work, they're fantastic for their intended purpose: Automotive LED lighting. (link edited)
Here are the shots of my completed unit. It is more, better light at about 1/8th the current draw. Plus the unquantifiable "cool" factor of having LEDs in the car...
(images edited in 2007!)