Picked up a PSP 3000.
I picked up a PSP 3000 at Best Buy back in July. I got the Rock Band Unplugged bundle. I also grabbed a few older games at GameStop. Here’s what I’ve got so far.

One thing I learned about the PSP is that the games really need to let you save in the middle of a level. I’ve played the first level on Killzone Liberation about 5 times so far. I always get interupted before I’m finished playing so I haven’t gotten very far with that game. Games like Worms and Burnout are great because a match or race can be finished in just a few minutes, so even if you have to stop in the middle of a game you don’t lose much.
Rock Band and Resistance are great games too, but if I play for more than a few minutes my hands start to hurt because of the awkward controls (Resistance) combined with buttons designed for smaller hands than mine.
All in all I like the PSP, but to me it’s only good for short gaming sessions. I’m looking forward to getting some classic games Activision Hits Remixed or the Sega Genesis Collection. It’s too bad you can’t play all the old NES / SNES games on the PSP. That would be really cool.