The PulseVU 2 controls up to 360mA (~18 LEDs), or purchase a Power Extender to add an additional 3Amps of power (~150 more LEDs).

• Simpler install for Wii -- No more difficult MP point
• Now works on Wii even if you don't have WiiConnect24 enabled
• Much smaller, simplified design
• Works on Wii, Xbox360*, and anything else with a 3V-5V power source

Official webpage with installation diagrams:
http://www.pulsevu.com/