When the very first iPod came out, all the pictures of it made it look like it was all white (because they use all white backgrounds and surfaces for the photo shoots).
I was actually disappointed when I saw it was half shiny metal. Mine (3rdGen) is scratched to hell, and the white part looks fine while the metal part looks horrible.
I'd like to see a Unibody iPod Classic in either 120GB or 160GB Flavors.
I for one miss the brushed aluminum from the original iPhone, and would love to see it in the iPod touch, and Classic (seeing how the Nano and Shuffle have already adopted it).
I think a silver and black would be awesome, and maybe expand the nano color scheme to boot too.