Play your PSP and display through the PS3

I heard somewhere you could play PSP games on a PSP and have it be displayed on your tv through your PS3, I just picked up a PSP and dont see any option for that on the PSP menu or the PS3 is it there and I just don't see it or is it not finished yet or what?

No, you couldn't do it with the fat psp.

Edit: You can play some ps3 games on your psp, though.