Japanese industrial designer Chiaki Murata’s METAPHYS brand has released HAKU, a metallic cover for the iPhone 4 that is just 0.5mm thick. It comes in 2 types of materials: stainless steel and titanium. Both are anti-fingerprint coated and serve as a slick and light-weight metal armor for your phone. The titanium version comes in a variety of colors (mat silver / gold / pink / blue / green) but at 8,400 yen, the price is a bit steep.
source: METAPHYS website