Hey I don't like everything that Apple does, especially lately. They are getting a bit heavy-handed. That said, they absolutely have no choice on this one. If they let this kind of stuff slide it will happen all of the time.
Their engineer screwed up (it appears). But it was an honest mistake. Hogan, his buddy and Gizmodo's actions were anything but. They're in deep sh*t.
I doubt they are in deep shit. Stolen property at best.
As to the rest, Apple is very predictable in their release cycles, and there is always lots of press. I don't have the sales figures, but they are probably available, and I willing to bet that Apple sees a drop in sales in the April-May time frame because of the impending new model that regularly occurs in the June/July time frame. So I doubt they lost many sales because of this.
They did not lose anything to their competitors really. The initial iPhone was revolutionary, but subsequent models have not been (processor and memory bumps mostly). The press has been speculating on the new model, and predicted the new chip. So, the competition probably had a good idea what was coming. Besides, I would not think 2 months is long enough to design a phone, optimize the OS, and get it into production.
I am not a lawyer, but I would not think that Apple would have much of a case for revealing trade secrets, as the engineer took it out of Apple and into the wild so to speak. It is forseeable that the phone might be lost and thus I would not think that Apple would have much of an expectation of maintaining secrecy once it left the campus.
Just my 2 cents