Say what you will about Nintendo, but one thing's for certain; it's always been dominant in the mobile gaming market. The Nintendo DS is no exception, with 77.5 million sold worldwide, nearly 23 million in Japan. Compared to only 41 million Sony PlayStation Portables worldwide, with 10 million in Japan, the Nintendo DS is the sure winner thus far. However, for five straight months, the PSP has outsold the DS in Japan, and that trend is not sitting well with Nintendo President Satoru Iwata. Iwata is hoping to reverse that trend with its newsest iteration, the Nintendo DSi. Not only is the DSi thinner with a bigger screen, but it also sports a digital camera and an audio player. The DSi will go on sale in Japan on November 1st for 18,900 yen ($180), but won't be abvailable overseas until next year. Nintendo is hoping these new features will give the device a much broader appeal; time will tell.