In my opinion, the psp is winning in graphics and features, but the DS is catching up. In the area of games, the DS is already better than the PSP, but I don't want to start a war with the fan boys and such but the thing is, the ds is behind in some areas that people want.
The PSP can play movies, music, browse the web, and many other things. And all the DS has are great games. And those games are great. I don't have to tell anyone who has played the DS, knows, Mario Kart DS, Brain Age, all kinds of great games are there. But the DS was unattractive and ugly. And it couldn't do everything the PSP could.
But, along comes this DS Lite. And the Lite looks nice! Almost, in my opinion, better than the PSP. And Opera, we find, is making a browser for the DS. So what is next? The DS seems to be catching up to the PSP, if it hasn't already won.