They've just announced a holiday song contest for their iPad synth app, Animoog. The winner gets one of Moog's new instruments to be unveiled at NAMM 2012.
http://moogmusic.com/news/2011-animoog-holiday-song-contest-win-moogs-next-instrument
I'm going to go out on a limb and guess it's not a theremin, but hey... we can wish, right?
My guess is... "The Moog Hammered Dulcimer"