Sony showed off new colors for the PSP at Tokyo Game Show a month ago, and it looks like they're all heading to stores... in Japan, at least. The Camo PSP was recently packaged as part of a Metal Gear Solid bundle. The new Silver and Metallic Blue colors for the PSP are hitting Japan, sans bundles. Except for color, they'll be identical to the current White and Black PSPs, including price (unlike the Signature line).
Europe gets the pink PSP, and Japan gets a whole assortment of colors. Why is the US stuck with just plain ol' black?