Aether Cone is a networked music player that looks like a speaker. It chooses music based on your listening habits, initially playing a random selection of audio from streaming music services, internet radio stations and podcasts, and gradually learning what you like, based on your choice of skipping a track or not. You can also request specific artists or songs by speaking into the built-in microphone.
It'll cost $399 when it ships in the summer.
NB: it only works with Mac computers for now, but there's planned Android support.