Found this on Hack a Day:
After pricing everything out, I decided to build a single mono channel to see how it sounded. $100 for the amp, $100 for the speaker parts, $100 for wood (real oak, just couldn’t use that compressed saw dust stuff). I ordered the parts and went to work. After about two weeks of working in the evenings this is what I came up with.
Though not as shiny as the Fatman iTube, this is still a cool looking project (I bet it sounds nice too) that gives the iPod some old-school hi-fi style.