DS Outsells Sony PSP and PS2 Combined!

According to N-Gage Gaming of all places, not only is the DS outselling the PSP in Japan, but the PSP and PS2 combined. I guess it did better than both systems over the duration of one week. Impressive stuff, but it will be interesting to find out US figures. As we all know, American and Japanese gaming are different beasts altogether. How do you think it’s doing here in the states?