Nintendo says it saw strong holiday sales in the US with both hardware and software performing well, reports Edge-Online. Nintendo says it sold about 3 million units of Wii in December. While it didn’t reveal sales for its other current generation console, Nintendo DS, it said the handheld system set a record in 2009 for most sales in a year in the US for any console. The company said holiday sales were also helped along by Wii title New Super Mario Brothers, which it estimates as selling four million units since its November launch. Read more at Edge-Online.