Jailbreaking is most certainly legal in the USA.
http://www.wired.com/2010/07/feds-ok-iphone-jailbreaking/
However, getting to the actual article at hand, and comparing that to say, Pangu, TaIG, comex, the evad3rs, and even geohot, You now see the difference between ethical and unethical hacking: hacking with the intent of making a software better by finding bugs and notifying the authors of the software of said bugs and proof of concept to make them better...
.. versus hacking for pure unadulterated exploitation.
Everyone needs to be sure to not lump one side of this in with the other.
BL.
Thanks for correcting me then. And I agree that there's a massive difference between the two things are radically different. Whilst the good form of hacking is no problem however, it is hard to allow it without also enabling malicious hackers.