writes "An Aussie network engineer has published a guide to building a serial cable connector that allows access to a secret kernel debugger hidden within Apple iOS. The debugger was a dormant iOS feature carried over from Apple OS, and seems to serves no function other than to allow hackers to build better exploits. The cable needs an external power source and a jailbroken device to access the debugger."
We've mentioned Pollock's serial adapter kit before
, modulo the kernel debugging abilities.