German Gamefreax claim to have reverse engineered a testing PSJailbreak device. They say this exploit is based on emulating of a USB hub which gets virtual devices attached and unattached at certain points during the boot process.
Among those emulated devices there is also one that uses the ID of Sony’s JIG module. Anyway Gamefreax claim this hack is based on a self developed exploit. Dumped files that might support this claim are not available at this moment…
Picture snippet of USB Stream is courtesy of Gamefreax.de…