[CLaNZeR]

I happen to have a sanguino sitting around that I should use for something sometime

If you already have the standard Sanguino board then you could knock up an adapter and use your existing CNC Controller box also.
I drew up a breakout PCB here

*** Step 1 *** Sanguinololu Breakout Board

I modfoied the Marlin Firmware to have a pause between steps that is more suitable for certain steppers and have released also.

Have fun !

Cheers

Sean.