digitalwanderer said:
So what exactly do I look for in a 1Gb card to make sure it'll work with the PSP?
Only that they are The DUO variety.
DUO means that they are the smaller cards, there are 1GB Memorysticks that area twice as long and they do not fit in PSP.
MemoryStick Pro DUO, or Memory Stick DUO (Pro's are supposed to be a bit faster, and I think you can't even get but Pro cards from 256MB onwards)
or
Memory Stick DUO.
DUO's the keyword with PSP compatibility, with DUO you'll be 100% safe.
The speed (Pro or not) shouldn't have much (if any) effect with PSP.