I'm not sure if anyone will know what I'm talking about, but here goes nothing. I've seen Karim Rashid has used color changing LED lights in a resaurant he did in New York. Linea also makes a cabinet with these LED's. I was wondering if anyone knew where i could purchase these LED's or if they know what company makes them.

Note sure that this is what you are looking for but I do know several restaurants use the Artemide Metamorfosi line of lighting that produces different lighting atmospheres. You can either dial a color or use the function that allows the color to change over time. This is probably along the same lines as what you are talking about but in a different application it sounds like.