Well... remember Apple lives and die by its prodcuct design and marketing not theirardware spec. I am not surprise why Apple treat their product design as a live and death top secreat.
I believe all emplyees in Apple must sign some kind of agreement to keep the company's secrect. Althought I don;t like the way Apple does things, but this kind of thing is never a news in the business world. People get fired for the same reason all the time.
No matter a co-founder or not, since Steve Wozniak has left Apple, it is not a surprise that somebody get fired by showing company's not yet available product (3G iPad was not available that time)to a non-company employee.
Poeple have the choice to not work in a company. However, when people decide to take the contract... he/she lives by the contract.
Same rule applys to CIA, FBI, military, many many private companies, and many others.