The scary thing about the ruling is that it sets a precident for SO much more than WoW. You kind of alluded to it with the iPhone, but its so much more.

The MMOGlider guy never accepted the EULA. Even if he had, EULAs are not a legally binding contract. He went and created a piece of software without ever playing the game.
Blizzard should only legally be able to ban those that break their EULA.

If I go and create a skin for windows or an mp3 player or something. Then they release a EULA and some means of detecting if I am trying to skin their program. If I figure out a hack to get it working, I am now held legally liable according to this precident.

They are two seperate pieces of software, he should be able to code to his hearts content. How they are actually put to use, is not the fault of the coder. If you don't agree with me, think of this: Should he legally be allowed to sell his software to someone that doesn't have a WoW installation and doesn't play WoW? Yes, it will be completely worthless, but that is for the consumer to decide upon.