It's ridicously expensive, absolutely useless when it comes to umbraco work (in fact it would probably ensure that I wouldn't get any work done), but boy - do I want one.
It's the Sci-fi of Synthesizer controlling and it's here today. Forget about iPod touch, Microsoft Surface or waporwarish youtube demos - this is the real thing. You can buy it at your local, well-assorted music hardware pusher - it's the Jazzmutant Lemur and it's freaking :-D