Nintendo has sold over 400,000 Wii U consoles during its launch week, beating the original Wii’s sales of 300,000. Retailers are having difficulty keeping the highly sought after item on shelves, as consumers are trying to get their hands on one for the holiday season. “Wii U is essentially sold out of retail and we are doing our best to continually replenish stock,” Nintendo president Reggie Fils-Aime told CNET. [Source CNET]