Alice Taylor of the wonderful Wonderland game-blog has a terrific review of the technical and social merits and demerits of the PSP in today's Guardian:
A PlayStation Portable is a strange thing. I sat next to a man on the London tube, two days after the PSP launch in Japan, and he already had one. He was playing it, it was glinting, and I couldn't help myself – I leaned over and said, "Wow! You've got yours already?" And he said, "Yes, here." And shoved it into my hands.
I had no idea what to do with it. I know how to work these things – it's just a Playstation, reflexes kick in – but oh my God, I was holding his PSP. Was he nuts? I'm a stranger! But this is what the PSP does – it makes you want to share.
You want to show people the quality of this illegal copy of The Office. You want to show that you can fit four of these episodes on a one Gigabyte chip, or eight of these slightly more pixilated episodes of Doctor Who. Superb. Like a sonic screwdriver, my PSP can do anything.