It won't work with only Swap Magic -> PS3 DVDR, mainly because Swap Magic puts the PS3 into 'PS2 Mode' when it loads... and you can't run PS3 games in PS2 Mode similar to how you can't run PS1 games in PS2 Mode on the PS2 (you need Breaker Pro for them, since it boots the PS2 into 'PS1 Mode' when loading).
I imagine they just block the SLUS of Swap Magic but didnt do the other versions.
Sony are so stupid!! They should hire one of us to bloody block crap like Swap Magic!
I thought of the same thing...but the problem is that if they block the SLUS of Swap Magic there will be nothing stoping them ("Swap Magic Stampers") from using a legitimate SLUS say to Kingdom Hearts 2.
Paradox has had probably everything they've released in trinkles over their .NFOs done for a while. My guess is that they got a hold of a $DK somehow and did most of their work on it. They release these little bits to keep the interest going, as PS3NEWS has stated.
Eventually it will get to a point where firmware updates will be non eventful by means of some manner of having the PS3 use more then one firmware.