I would love to see some real innovation in this area, because i think there is so much that can be done to retrofit every single switch in a current house with something.

I've currently given up because my house has 4 3 or 4-way circuits and there are really only 2 pretty poor choices for 3-way switches, and none that i can find so far for 4-way that don't require you to fully rewire the circuit and then have the controller to fake the 4-way-ness of the circuit.