Anyone here seen one, played them, know anything about them? They're showing up on YouTube.
Casio US's current models for these are the CTK-7000 and WK-7500. These models here not only have different model numbers, but slightly different design as well.
Perhaps these will be hitting the US soon (perhaps?)
http://www.youtube.com/watch?v=Y8TsvZ6ra54
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.