Ok, so we have wood down. What about metal, chrome, plastics, lexan, other interesting materials.
And Panya... that's cool, but that is an example of interesting and useful technical engineering, not really a cabinet that finds its uniqueness derived from the materials it's made of. My example wasn't 100% on target either, but I didn't have much better.
One time I saw a Ms. Pac Man cab made entirely out of lexan. That was pretty amazing, but I can't find a link to it now.