Actually, guys... Tremble is right. The DS is actually overtracked by 53.7 million units and is only at 45.06 million units sold. This makes the PSP the number #1 selling handheld in what has actually been a coup of the handheld market overlord since the original monochrome, cinderblock, Gameboy.
And with all the PSP games being released this year, along with a new Monster Hunter title, the PSP will only extend it's lead.
True words spoken.