Remember if you require an unlock do not upgrade to iOS 4.1, you will need to wait for the next PwnageTool release. The only exception is the iPhone 4 which could be upgraded to iOS 4.1 without updating the baseband.
● iPhone 3GS, iPod Touch 3G, iPad, iPhone 4, iPod Touch 4G
● 3GS new bootrom is broken, fix pending
● 4.0-4.1 and beyond+++
Keep checking back for our tutorials which will be posted momentarily.
● iPhone 3GS, iPhone 4 (Windows)
● iPod Touch 3G, iPod Touch 4G (Windows)
● iPad (Windows)
● How to Update Your iPhone 4 Without Upgrading the Baseband (Mac)
● How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)
According to MuscleNerd: "SHAtter will be held back now, so it's not the worst possible scenario. Who knows, maybe SHAtter can even be improved."
The third version of Limera1n is out now. It fixes a bug with the iPhone 3GS on the new bootrom.