Although it is published just a day ago, iOS 4.3 has part of the first bundle for PwnageTool that helps you jailbreak your terminals. The new bundle should work with iPhone 4, iPhone 3GS, iPad and iPod Touch, but devices with new bootrom have a tethered jailbreak. I don't recommend you to test this bundle unless you feel like doing a restore in case it doesn't work or if you don't need an unlock.
You can download this bundle of here, enter it in PwnageTool and make a custom ipsw with it. I will not give details for now until I test to see how it goes.
UPDATE: It seems that this version of PwnageTool only has a modified file and does not work. When loading the custom ipsw, error 1601 is displayed.
