Mass storage stone
I found Michael Leung's "mass storage stone" stunning:
Mass Storage Stone - prototype, 2005 A portable 4 GB hard drive that fits into your pocket, and has similar qualities to a stone - textured and slightly cold to touch 53 x 40 x 25 mm - synthetic resin
Why do I blog this? I actually like the metaphor of the stone for an external hard drive; the shape is also convenient.