Yes you read that right ! The just released iOS 4.3 GM for iPhone 4 has been jailbroken already. The jailbreak though is tethered only for now, which means that you will have to boot it into jailbroken state every time you reboot.

PwnageTool bundle for jailbreaking iPhone 3GS on iOS 4.2 GM has been released. You can use this bundle with PwnageTool 4.1.x to jailbreak your iPhone 3GS (old bootrom only), while preserving your old 05.13.04 baseband so that you can unlock it using Ultrasn0w.

PwnageTool 4.1 has been released. You can use it to cook custom firmware files without the upgraded (2.10.4 / 05.14.02) baseband for iPhone 4, 3GS and iPhone 3G running on iOS 4.1 so that you can unlock it using the existing version of Ultrasn0w. This version of PwnageTool also supports hacktivation.

iPhone developer and hacker iH8sn0w has shared more screenshots from the upcoming version of Sn0wbreeze which is going to support almost all iOS based devices. For those of you who don’t know, Sn0wbreeze for Windows, like PwnageTool for Mac, can create custom firmware files without the upgraded baseband so that you can unlock your phone using the existing version of Ultrasn0w.

PwnageTool Bundle for jailbreaking iPhone 3GS (old bootrom) on iOS 4.2 Beta 2 has been released by msft.guy. You can use this bundle with existing version of PwnageTool to create custom firmware files which are jailbroken and hacktivated for iPhone 3GS. But as always, this bundle is meant for iPhone 3GS with old bootrom only. Those of you who are with new bootrom will have to wait for SHAtter exploit based PwnageTool or GreenPois0n jailbreak tool, both of which are expected to release soon.