The iPhone 4 NCK Unlock Progress [Update] - GeoHot
It looks like the iPhone Dev-Team successfully dumped the seczone to do the brute force NCK cracking offline. It also looks like they were able to capture the official NCK key from their carrier which they needed to “decode” the encryption algorithms that are used to generate the NCK key. That way, in combination with the NORID and CHIPID (and likely some additional information from the baseband), they will be able to generate the the NCK for every unique device out there.