Have a look at this Apple Floppy Amp if you are an Apple fan and would like to hold on to some history.
"PARTS – Note that not all are necessary and many can be substituted (e.g., you probably don’t need the $30 volume pot, the one that comes with the amp works pretty well)
– Sonic Impact 5066 T-amp
– Apple PC 5.25 Floppy Drive
– 12V, 2A Power Supply (min 1.5A for substitutes)
– ALPS 50K Log Stereo Potentiometer (Volume)
– 1/4" Volume Knob
– 12VDC, 6A DPDT relay (or even SPST)
– 4x Speaker Terminals
– Stereo RCA Jacks
– Power Cord
– Misc Wiring
TOOLS:
Soldering Iron
Wire Cutters
Assorted Screwdrivers
Assorted Cutting Implements"
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Apple “Gum Drive” http://www.instructables.com/id/Gum-Drive/
I often forget I have a 20 gig harddrive in my ipod