Wow - I'm a Jordan Rudess fan all of a sudden. He's appeared in many Moog videos before, but I've just seen him demonstrating a synth I'm looking at for work called Omnisphere. An incredible piece of software, but geez can this bloke tinkle a keyboard.
http://vimeo.com/5721459?ab
Check him at around the 5:45 mark. Pretty cool indeed.