Dev Team: 24Kpwn lives on!
From their Twitter:
"Jailbreak. Unlock. Coming."
About 5 hours ago, we were able to verify that the 24Kpwn exploit that the hybrid team used on the iPod Touch 2G is still present in the bootrom of the iPhone 3GS. That means we can apply the same sort of technique used by our current redsn0w tool to jailbreak and unlock the iPhone 3GS.
This is great news!
For our technical notes on where the 24Kpwn exploit is in the 3GS, see here (pastebin hash of it is here).
And yes, ultrasn0w will be able to be run on the iPhone 3Gs for you unlockers!