We love reading articles like this. Folks who use old gadgets for novel purposes make our geeky little hearts dance. Take as evidence the DIY iPod video projector and the iPod nano slide viewer.
Today we came across a post from jeffkobi at Instructables describing how he turned a 5.25" floppy drive into an amplifier. After building a prototype with a Tupperware container, Jeff (can we call you Jeff?) put the guts of a Sonic Impact 5066 T-amp into the drive case (it fit quite nicely, actually), attached a volume knob and in/out ports, connected his iPod and was in business. A retro-amp that looks cool on any desk.
Well done, Jeff!