I've had a PSP since day one. I bought a second PSP for my son. On no occasion have we used our PSPs for music, photos or browsing the web (though I have put movies on there). The PSP is a portable game console. It's good stuff (we have a DS as well). My son and I enjoy the games that are on both devices.
But the bottom line is that the DS and PSP do not compare to an iPhone. The iPhone is a great overall device. The web browsing is well done, and movies and music are spot on. The addition of apps and games just puts it over the top. The iPhone is the one device I carry with me for all my work and entertainment.
Sony and Nintendo aren't late to the table...they're sitting at a different table altogether...way in the back. Apple got it right. They figured out the market, put all the right tools out there, and they're pulling away from the pack.
Good luck to Sony trying to sell in a music store for the PSP.

--DotComCTO
But the bottom line is that the DS and PSP do not compare to an iPhone. The iPhone is a great overall device. The web browsing is well done, and movies and music are spot on. The addition of apps and games just puts it over the top. The iPhone is the one device I carry with me for all my work and entertainment.
Sony and Nintendo aren't late to the table...they're sitting at a different table altogether...way in the back. Apple got it right. They figured out the market, put all the right tools out there, and they're pulling away from the pack.
Good luck to Sony trying to sell in a music store for the PSP.
--DotComCTO