First, Nintendo didn't make the Powerglove. Secondly, Nintendo DS is killing the PSP anyway you cut it. At the Expo in Japan, I saw 1 PSP being played, and 15 Nintendo DS systems...yes, I counted. The Expo drew in over a million people every single day, so you had swarms of people waiting in line to go into the Pavillions. Thats where they're all being played. I went to the Expo 4 times.
And now that WiFi is active, these PSP players can enjoy watching everyone have fun with Mario Kart and who knows what else they'll come up with. Anything is possible. Yes, PSP has WiFi. So far it's a turd. DS had a slow start, but that was a year ago.
...and Burnout is shit indeed on the DS. However, for every shit DS title, you have 10 Shit PSP titles.