Made from a block of aircraft aluminum, Mobiado's black Stealth Mobile is inspired by the bomber of the same name. Only 1200 will be made, so I expect the price, while not quite as expensive as a B-2 Spirit, should hit you in the pocket. Full specs of the small-buttoned beauty are below.

Band GSM 900/1800/1900MHz
Size 109mm x 46mm x 18.5mm (4.3" x 1.8" x 0.7")
Weight 177g (6.2oz)
Battery Life up to 2 weeks standby time
up to 4 hours talk time
Main Display 262k color TFT, 320x240 pixel resolution
Camera 2 megapixel
Video Yes
Messaging MMS/SMS/IM
Bluetooth Yes
Memory 6MB internal, microSD card slot
Availability Unknown
Other Speakerphone, aircraft aluminum body, sapphire display and camera window

The Mobiado Stealth was released yesterday, but so far without a price. [Sybarites]