Thanks for the answer ere.
Ujn, I wasn't wondering if all psp games were playable on the PS3, only the ones downloaded through the psn. If downloaded psone games were playable on the PS3 there was a chance that psp ones were as well, hence my question. I really don't mind one way or the other I was just curious. As for PS2 games being playable there are rumors about them being offered as downloads in the future which is supposedly why they took out the bwc.