used Blender 2.49 and used blenders python API get get the angle of the object whenever it was updated. I would use the pySerial module in python to send the angle out the USB port. The arduino would read the angle and use the Servo library to turn the servo.
What have you got.had hooked upto the arduino and how What were you doing before it stopped working What sketch have you uploaded to it What happens when you follow the troubleshooting guide posted at the top of the forum? Is it a 'real' arduino or a cheap clone/copy?