Ish. That board will run 1 2amp stepper, but you'll struggle to get any decent speed out of the motor with only 12v to play with.
With steppers, voltage means faster coil switching (the time taken to change the the magnetic state of each coil, more voltage = faster change).
I'm aiming to use 24v or 36v to start with (either 2 or 3 atx power supplies wired in series
:D )
Check out these:
http://www.schmalzhaus.com/BigEasyDriver/