It’s official - in the 31 months since its release, the Nintendo Wii has sold 20 million units in the US and 50 million worldwide.  This shouldn’t come as much of a surprise — the Wii was the best selling home console in the month of May and to date a whopping 54 Wii titles have sold more than a million copies.  Look, I could go on about the unstoppable force that is the Wii, but I don’t want to keep you from polishing your swing on the virtual back nine in Wii Sports. Fore!