I wanted to add some comment to the list. I have Batman: Arkham Asylum, I was able to backup the save using the hard drive backup utility from PS3 and restore it to be used in another PS3. And I was able to copy the save file to USB flash drive without problem. The save is not locked to my PSN account either since I am able to load the save file using another username.
By the way, I have US verison of Batman: Arkham Asylum.
Also, go and vote for this at Playstation Blog Share, it might not get Sony or developers to drop the locked saves, but it should raise some attention.
I'm probably just sharing an obvious fact, but Burnout Paradise also serves the torture of locked game save to us, so whenever you need to reformat or get a new ps3, you have to part ways with a hell of a lotta work