i hate to see all these dumb comparaisons... here are some details that a iPod can do all day long, that PSP will never be able to:
iDJ Mixing Console for iPod -- DJs can now make a full party only with 2 ipods...
http://www.numark.com/products/produ...overview&n=132
Apple iPod Camera Connector -- now plug your digital camera in your iPod and take millions of photos
http://store.apple.com/1-800-MY-APPL...plm=M9861G%2FA
FM Transmitter with LCD for iPod. -- direct fm radio in your ipod!
http://www.griffintechnology.com/products/itriplcd/
Laser Pointer and Flashlight for your iPod or iPod mini - for teachers and scientists!
http://www.griffintechnology.com/products/ibeams/
and i mostly forgot the legendary iPod SOCK: