David Merrill’s Siftables

Spotted David Merrill’s Siftables project in the New Scientist yesterday, then came across this talk he gave at TED. I like the idea of using the Siftables as a music controller/instrument, but I think too much functionality is being packed into each device. Perhaps the music-Siftables will get really interesting when each block is smaller and cheaper, so that you could use a few hundred of them at the same time.
Below is a video of just the music application:
Siftables Music Sequencer from Jeevan Kalanithi on Vimeo.