The iPhone Dev-Team is back, this time with the first beta of RedSn0w 0.9 for Mac and Windows. Version 0.9 will allow for jailbreaking, unlocking, and customizing of the iPhone OS 3.0/3.1.2 software. It is important to note that this beta supports every iPhone and iPod touch with the exception of the iPod touch G3. (That will be supported after the beta period is over.)
For quite some time now blackra1n has been the most-used tool to get your jailbreak on but the way this new version of redsn0w works, could that change? You see this software uses the original Pwnage bootrom exploit from iPhone 2G, iPhone 3G, and iPod 1G. What this means is the only way for Apple to combat it is via a hardware change. However, for the iPhone 3GS and iPod 2G running 3.1.2, things are a little different as they still use the USB exploit that is said to be going away with the iPhone 4.0.
Due to some last minute forum software changes, the Dev Team
If you'd like to check it out for yourself, the Mac version can be downloaded here while you can grab the Windows version here.