Honestly, this isn't going to last. First of all, all it takes is creating an algorithm that generates the same responses as the new firmware when pinged by the PSN servers. They've got the part of the firmware that generates the response to the pings, all they need is to figure out what signals come in that generate what signals going out. Literally, all you'd have to do is have your PC 'imitate' the PSN and send signals to a PS3 with the real firmware, and have it record responses to everything sent, and have the program recording generate an algorithm that would create the proper responses to the proper input signals. It's like brute force cracking a password, it takes time, and patience, but with enough data and the code, a fix will be made.
As for testing it, make a couple fake PS3 accounts, try them out, and spoof your MAC address (for added protection, have your router run your connection through a proxy), and everything's nice and protected. Sony is fighting a losing battle. And you know what? I'm happy.
I haven't modded my PS3. But I hate the idea of LICENSING my PS3. I want to own the damn thing if I'm paying for it, not license it. And I hate the idea of someone else having control over what I can and can not do to stuff that I should OWN. Intellectual Property has gone too far and is absolutely ridiculous. It's controlling and ONLY benefits corporations who can afford the proper lawyers to keep people in line. A lot of people involved in this are doing it as much to fight the system, as to get extra functionality on their system, or even pirate.
Just because the hacks CAN be used to pirate, doesn't mean that's the MAIN reason for them. There are LOTS of reasons why people hack. Ninety percent of hackers do it for the challenge and status, and those are the good ones who actually get shit done. People have said it here, and it makes sense. It's more effort to actually spend the time working on hacking the system than it's worth to just avoid paying for a handful of games. Imagine how many man hours and how much time must've gone into hacking the PS3. Then think of how many games you could've played in those hours. How much overtime you could've gotten for working those hours, and putting that $$$ into games.
You won't stop the hackers, because they're after the challenge, rather than the 'free games' and the 'piracy'. They want to be able to open the system up so they can play with everything that they can involving it, fiddle with the system and the OS, and everything involving it. This leaves it open to the pirates to do their thing, yes.
The fight is lost, the end is neigh. Weep.