Video: Yamaha's Grid Sequencer "Tenori On" Launches in London
Yamaha's "Tenoni On" button-matrix sequencer launched last night in London and several folks were on hand to play with the unit, write rude phrases in its lights, and generally have a trippy-dippy experience.
Music Thing (celebrating its/his third anniversary!) has a nice collection of videos, including the one embedded above.
Live from the Tenori On launch in London [Music Thing]
Previously: Grid Sequencers Coming Soon: Tenori-On and Monome [BBG]

the latest
latest episodes

this is older:
http://monome.org/
http://monome.org/media/se_tilt.mov
I just picked up a copy of this guy's DS game, Elektroplankton. It's easy to see that it was made by the same person :)
(FYI: Elektroplankton is a RARE DS game which, well, isn't really a game.. it's a series of musical 'toys' that you can use to generate music just by playing with the thing. It's pretty cool.)
I've got Elektroplankton! It's a great game to show friends, because once they've played through it for 15 minutes they've seen all there is and will give it back.
how much is it?
These things are so awesome. I wrote my finals essay for Technology Discovery Class on the Tenori-On