Do we have anyone with real US legal knowledge on the boards by any chance? I'm no expert but sniffing around it does seem Sony does have more than a zero chance to prosecute here.
Unless I'm missreading stuff the impression I've gained is that their is a law in US preventing breaking included security countermeasures in electronic devices - with the exception of phones for some reason. When you buy and use a PS3 you are agreeing to abide by that law in the US so far as I can see.
With the iPhone the exception for phones protected those hacking it I would presume. Unless I'm reading it wrong the PS3 does have legal protection from hacking which allegendly has been broken - i.e. opening it up, modding it, etc. without breaking the security would be fine, but if you did break the security to do so... then you've commited a legally punishable offence.
Now, I have no idea whether that law is upholdable - or even if I've read it accurately - so I'd like opinions of anyone who is more familiar with US law.