Here's one of those inventions that just makes sense. The Hidden Tap by Jelmer Moorman uses a sensor to follow your hands and dispense water. As you move your hands from left to right under the faucet
, water goes from hot to cold just like a regular tap. We have no word on availability, but Hidden Tap is part of the Kunst Zonder Kapsones venture company started by Fernando H. Arias, so we have a feeling that given enough interest, this thing will be showing up in high-end contractors' bags of tricks at some point. Hit the continue link to see the thing in action, but be warned -- it's a .wmv file.