Ok, thank you for the clarification. So the Vin pin can be input or output? hmmm...
I am hoping to turn this arduino into an ipod controller/ rgb LED VU meter. Do you think I will be able to do this? (16 rgb LEDs, + ipod serial control) or is there not enough power with just one duemilanove? Will the power for the LEDs come from the board, or an external source?