Yeah – we realize how odd that headline might seem. Apple doesn’t exactly endorse jailbreaks, so the idea that any jailbreak method is “official” may seem strange. But with just about every major release coming from one group, certain releases inherently just have more cred.
The just released iPhone 3.0 Beta 3 has been cracked wide open, albeit not by the iPhone Dev Team – hence the “unofficial” bit. Early reports indicate that it seems to be working fine – but as usual, tread with extreme caution, and read before you leap. There are a few important things to take note of. For example: if you jailbreak using this method, you’ll permanently lock out the iPhone OS 2.1 jailbreaks you might want to use if you ever decide to downgrade.
More information (and the download link) available here.