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I like this (monome on my wall?):
http://www.kickstarter.com/projects/863853574/touch-board-interactivity-everywhere -
i thought this was cool too
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That electric paint is super cool!
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Been using Bare paint for tons of projects along with a makeymakey and arduino stuff with raspi or a shield to do sounds. Its nice to see a compact in-one solution. I backed 2 of them - for work and play ;-)
The paint is awesome for e-textiles stuff - you can quite effectively create proximity sensors on a shirt that you wear, maybe make a bit of a one parameter filter or something.
I personally wouldn't use it for live stuff as for me tapping physical tactile buttons beats a flat non responsive surface (tablet/glass/wall/table) but i will be able to make my touchable huggable trees a bit quicker....