The latest manufactured iPhone 3GS devices seem to contain new bootloaders, which can not be compromised using the 24k bug. Although Musclenerd of the iPhone Dev Team paints a dark future, Mathieu Hervais expects that there are still ways thru the chain of trust in order to jailbreak.
Update July 5th, 2009: GeoHot now also provides a Mac OS X version of the jailbreak tool. Windows and Mac versions ready for download at purplera1n.com…
That’s it with the 3.0 firmware and the iPhone jailbreaks. Apple has been beaten again. This time by GeoHot. Although the iPhone Dev Team seems to have their programs already prepared they preferred to wait with the release of an updated PwnageTool. GeoHot did not wanna wait and decided to release a Windows based jailbreak tool for the iPhone 3Gs called PurpleRa1n.
All three iPhone generations can now be activated, jailbroken and unlocked with the current firmware 3.0. Currently for the iPhone 3Gs there is only a Windows version available that is under strong beta testing. Anyway you can give it a try. The security whole that gets exploited in the iPhone 3Gs is well known as the 24k bug that has been found in january in the iPod Touch 2nd generations.