The problem with the PSP
The problem with the PSP was always that Sony practically denied the thing existed, it had practically no marketing after it's initial launch with the exception of a bit of buzz in the gaming press every time a new model came out.
It is however a seriously good hand-held, not only in that it can mop the floor with the DS specs wise, but it also has a web browser, will let you watch movies and play music you drop on the memory stick, stream video from your PSP, listen to internet radio, work as a skype phone etc. It's only now, right at the end of it life, that some of the more expensive smart phones can replicate it's full set of features.
On a side note they are pretty well catered for in terms of jail-breaking and custom firmware, having a snes emulator with a 4' screen in your pocket is never a bad thing.
Lets just hope the PSP2 has 2 analogue sticks,