I pulled out the 20gb (Seagate) and stuck in one of my older SATA laptop hard drives. Booted, formatted, and working fine. I also noticed that the drive I yanked from the PS3 is amazingly quiet, even while transferring files, there was no noticeable change in sound from the drive. Also, the PS3 Is recognizing my USB card reader no problems.
It also works with my Microsoft Wireless Intellimouse Explorer 2.0 but Resistance doesn’t seem to support any other controllers. Dang.