This is yet another cool concept phone that will never see the light of day, the Sony Ericsson Nan. As you see it comes in a slider form-factor available in black and white variants, runs Android and has a large touchscreen display. We presume it also supports some 3G network, like HSDPA for instance, and offers dedicated music and video playback controls, and a durable battery.
There's also an illuminating Android LED that informs you of different connection speeds and provides status notifications.
It's a real pity the Nan is just a concept, it could probably be the company's next big thing.