Although the rest of the world will have to wait a bit longer for having both choices, Nintendo's Dual Screen handheld gaming device "DS" will start retailing this weekend in the US, bringing voice interaction and a touchscreen (one of the two screens). The Japanese market, in the other hand, will have the Sony PSP shipping to stores on December 12nd (end of March in the US), less than two weeks after Nintendo launches the DS there. Hopefully we will have enough press reports by the time the PSP arrives to stores worldwide, PC World has a short article with more information on both devices.