I have found many people on the internet to have problems with the PSP like "the battery life is crap" "they all have dead pixels" etc. (These are all the people that don't actually have a PSP) Well I used to be one of those when I first got my DS. After about 2 months the PSP was too tempting, I got it, and there is absolutely nothing wrong with it. The battery is actually pretty good (5 hours ish including some USB transfer), and I have no dead or stuck pixels (that seems to have died down recently, I think Sony upped their QC). The reason I used to slate the PSP, while admitting it is still good, was to justify my purchase of the DS. Now I have both I can safely say they aren't comparible - they are different, although I can see myself getting more use out of my PSP as it isn't just a games machine. All I'm saying is - random people on the internet, quit slating the PSP (and the DS for that matter)
On a side note that has nothing to do with anything ever, who reckons Sony will release a PSP camera/video camera addon?