Sony Ericsson showed off its new Black Diamond concept phone. It looks really good and has a "borderless screen" effect:
This was achieved by throwing on a layer of polycarbonate, coupled with integrated a screen based on OLED technology. Although candybar style handsets might not be as popular as swiveling, sliding, or flipping phones, this Black Diamond idea can certainly grow into those form factors down the line, much like how the RAZR morphed into a SLVR.
Not much is known, except that it features a 4 megapixel digital camera. You can check out a photo over here.