Users running the latest iOS4 on their iPhone 3G or iPod Touch 2G just got lucky. They can easily jailbreak and even hactivate their devices thanks to the newly released version of redsn0w.
Update 23 June: Pwnage Tool v.4.01 has just been released. It’s a Mac-only tool but would allow you to jailbreak iPhone 3GS too (besides iPhone 3G and iPod Touch 2G).
The iOS 4 Gold jailbreak took a while before it was ready, but the final iOS version was beaten for less than an hour. Redsn0w can now jailbreak and hacktivate any iPhone 3G and iPod Touch 2G.
Redsn0w is available for both Windows and Mac OS. You can get more info and the latest redsn0w tools from Dev-Team blog. As always, proceed with caution.