If you’re a subscriber to engadget or follow gaming news online at various indie blogs / news sites like digg, you will probably have seen the below graph. It shows the power usage of all three gaming systems and an average pc (pc’s vary quite a lot).
Simply put the Wii destroys everyone else. The PC comes in unsurprisingly the worst and the PS3 is second followed by the 360. Here’s the chart if you havn’t already seen it.