You could ask Marco Arment for a copy of http://www.marco.org/secondcrack http://www.marco.org/secondcrack It sounds like it does what you want, except for the

You could ask Marco Arment for a copy of http://www.marco.org/secondcrack http://www.marco.org/secondcrack It sounds like it does what you want, except for the part about being a binary, and he says he intends to open source it soon anyway.