Using a variable for speed control

I am using a Arduino Duemilanove USB controller and a Pololu Low voltage Dual motor controller. Can anyone give me help with the syntax for using a variable as the speed for the motors?

I don’t have an Arduino platform to test on, and I don’t like posting untested code (it always seems to come back to bite me) but I can tell you that your Pololu LVDSMC uses the same serial command protocol as the Pololu micro dual serial motor comtroller (udsmc) so that gives you a few more terms to google for. You might take a look at this tutorial, and let us know if its any good.

Good luck,