Dev Team Upgrades Jailbroken 3GS From 3.0 To 3.1
The iPhone Dev Team has announced that they have successfully upgraded a jailbroken iPhone 3GS from OS 3.0 to 3.1 without losing the jailbreak. This means that there will probably be an update to the PwnageTool soon to support making a custom IPSW for upgrading the iPhone 3GS. We’ll let you know as soon as it drops.
Proof that they upgraded a jailbroken 3GS: