After the tests undertaken by Andrew, we have just received confirmation via the IRC channel of Saurik that the new Firmware 3.0.1 does not update the Baseband for which Apple did not implement any new method of defense against the Jailbreak and dell'unlock . It follows that RedSn0w that PurpleRa1n should be able to unlock the new version of the operating system.

However we recommend not to do so, and wait for an update by the DevTeam and GeoHot that they need to add new tools to their Bundles. It holds your security and there is no particular reason to hurry because the changes in the new Firmware is practically zero.