A lot of people are commenting on how great it apparently is to use the PSP as a "manga viewer". If you rotate the images 90 degrees, then hold your PSP on a 90, you can see the entire page without having to scroll up and down.
But how exactly do you get manga (Japanese comic books, FYI) on your PSP? Piracy, of course!
(BTW, I can't see how reading bootleg manga scans on a screen that would have only 272 pixels of width resolution could possibly be "a good thing", scrolling or no scrolling.)