Supa
[10] Knight
I may be mistaken but I think you need a special type of dvd drive if you wanna read from xbox 360 dvds. In the case of PS3, I'm not sure if it's hard to read a PS3 bluray disc to PC. Easiest solution is if you have a modded 360/PS3 as then you can use homebrew tools for copying files from disc to a harddrive.
I thought PS3 blue ray discs could be dumped by any blue ray drive.
360 stuff... I think you're right about needing a special drive. There is a game data extractor for "installed" games on the 360, I think. That would be good enough to try to dig out assets. I was pretty sure you can do the same thing on the PS3, but if you can just dump the disc from a normal drive then this option didn't seem worth mentioning.
Either way, if you have a modded 360 or PS3, you can dig through the files right from the console.