The PSP.....
Plus: Better graphic, Bigger better screen, Better games, Music, Movies, internet, wireless link, More third party support, System looks better (DS looks like a Foreman grill reject xd ), uses UMD discs, Built in Mic, the list goes on and on......
Con's: Battery life short (Only because it USES disc), Didn't come out before the DS, The PSP cost $50 bucks more than the DS.......
And the DS is NOT innovative, the touch screen has been used on Palm pilots for like 10 years now, and yes they have games on the too.....Hell there's cell phone with touch screens now......The touch screen on the DS is more of a gimmick than anything else, besides don't you think you all talk or type too enough people already? That's not going to get me to buy a DS.....I see no really good use for the second screen, and Nintendo hasn't shown us a good use, nor games to back it up!