It appears that after less than a day of the initial beta version of iOS 4.3 was released to developers, that the PwnageTool has been tweaked to allow an iOS 4.3 iPhone 4 jailbreak. A version has not yet been expanded to other iOS devices such as the iPad yet, but the incorporation of the iPad for this GeoHot bootrom limera1n exploit.
This unofficial jailbreak for your iPhone 4 was not released by the Dev Team, firmware 4.3 beta 1 is necessary to create a custom firmware to restore it later with iTunes. Apple has yet to patch the limera1n exploit...drop a comment with your experiences.
iPhone 4 PwnageTool Instructions by iPhoneitalia
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