For anyone interested, here are a couple of Arduino tutorials! A lot of people ask how to control motors (brushed and brushless) and servos so I made these:
Brushless motors:
http://www.youtube.com/watch?v=khvzB0_Wj_U&feature=plcp
Servos:
http://www.youtube.com/watch?v=BfMfysmfoNM&feature=plcp
L298 (DC motor controller):