On the hardware side of this idea: With a little soldering, you can turn any LED on your PC into a much more fun accessory.

For example, Instead of a single, tiny light blinking when your HD is accessed, you can wire the light to a whole rack of LEDs, so that your computer's thought processes are much more visual.

I took the front of an old modem (extra credit if you rememer what TR HR HS OH CD SD RD stand for) and soldered all the LEDs together. With some speaker wire, I spliced that to the light on the front of my PC. Now when I tell it to do my bidding, it tells me with big red lights "YES MASTER!!!"