myresistance.net doesn't have any game saves uploaded?
Are you saying the game save files embed your PN ID details and MAC address of your PS3?
ps3gamesaves.net has a nice collection of game saves. Only thing is, you wonder how long it will be around and whether it can scale to host tons of files and downloads.
gamefaqs.com should be a more permanent store for PS3 game save files but they don't post the files right away, go through some kind of review process, which might not be a bad idea in case there are malware developed.