We already heard that the Big N managed to lighten its DSi inventory by 300,000 during the handheld's first full weekend in America, and apparently another 135,000 procrastinators swooped in to grab one as the week finished up. Potentially more amazing, however, is the overall impact of Nintendo in the month of March. Last month, Nintendo systems accounted for just south of 60 percent (58.4 percent, if you must know) of all video game hardware sold in America. And yeah, that's even despite a shocking 17 percent drop in Wii sales during the same 30 day window. Have we mentioned lately that things seem to be going quite well in the Mushroom Kingdom? 'Cause they definitely do.