The prices of these games will be between $5.99 and $10.99 and they will take up between 140MB and 550MB on your Memory Stick Duo.
The biggest sticking point for many PSP users, however, is that, as previously reported, you can't just download the games directly to your PSP -- instead, you have to download them onto your PS3's hard drive first and transfer 'em to your Memory Stick Duo from there.