Well if you got your iPhone 3G and 3GS locked since after upgrading to new firmware iPhone OS 3.1.2, then with a smile on face GeoHot has back once again to rescue you to unlocked you iPhone. Well if you updated your iPhone to OS 3.1.2 through iTunes, then you can unlock your iPhone using this new tool.
GeoHot has also got screenshot of arbitrary code running on the baseband, which confirms the launch of Blacksn0w.
In recent post on iphonejtag, the team working hard on unlocking tool called Blacksn0w. This tool is said to unlock 05.11.07 baseband on iPhone 3G and 3GS and there is some difficulties for creating unlock tool for latest baseband. So it will take some more time to get final release of Blacksn0w unlocking tool.

