Evil Mad Scientist Laboratories has teamed up with Because We Can to create two awesome interactive LED coffee tables with hundreds of LEDs in the tops that respond to motion. Because We Can is selling completed tables for $1800 to $2500. EMS Labs is selling the LED tabletop kits (you provide the table and endless hours of soldering) for $350 or $450 (depending on the number of LED panels).
Interactive LED Coffee Tables: Update and kits! – Link