I've always wanted a Puma driving boot, but my feet are just too damn wide.
I'm using synthetic flat-soled soccer shoes now.
(currently using these. Don't laugh about the color, don't have much choice out here)
Allows a lot of flex at the toes, comes with a nice thin sole and rolled heels.
Better than driving barefoot.
I sometimes drive in aquasocks, but those are a bit too flexible. I like the sole to be a bit stiff.