Brinith:
I meant auxillary power as in another molex. And I only plan on getting as low as about 30-40% fan speed, so the motors shouldn't have a problem.
Look on ebay for led panel meters. There are ammeters and voltmeters for various ranges. It's fun to plug in a few of those into a circuit to see values change all at the same time. They're much more convenient than one multimeter probing around, and saves the annoyance of patching wires to plug the ammeter inline.
Check out Circuit Simulator Applet I found this one literally only a few days ago and haven't really gotten into it much but it looks awesome. You'll see screencaps of circuits posted here once in a while for demonstration purposes.
Being fairly new to electronics (well creating it), I didn't realize it to be as complicated. I just assumed it would be simply connecting the PWM pin to the Arduino's, and supply them both with power through the PSU and witha change of a variable, that would be it.
It's complex and intricate for only the first... few hundred times. LOL! The blinky LEd is everyone's Ardiono-101. The fasn is only a couple of parts more than the LED. Add a FET and a couple of resistor and it's a -great- Arduino-102. You'll learn a lot from it.