I have a metal lamp that turns on/off by plugging/unplugging the socket. What components would I need to make the lamp into a capacitance touch switch lamp. Also how small can I get this components since there is little electrical hiding space. I was thinking something along the lines of this.

http://www.youtube.com/watch?v=HxO2Yp0i_gY

sounds like a good research project....good luck