Joe Hewitt is the developer that you need the iPhone Facebook application acclaimed by its users, he also participated in the development of the Firefox browser. It's a big deal of anger that is shared by announcing publicly and forcefully statements, it stops developing iPhone and Facebook application that (you worry), he transfers it to another developer.
The reason for his anger is related to the approval process that Apple has put in place so that applications are available on the AppStore. He expressed that this validation process is contrary to what he wants to contribute and he prefers to return to web development, or freedom is greater.
He is also concerned about the precedent set by the review process of the AppStore, which could become the norm in the mobile world.
So what do you mean the process of validating the AppStore is it a breakthrough or a disability?