Ultrasn0w fixer has been updated for support on those running the marginally-tweaked iOS 6.0.1, released by Apple a few days ago. So those of you looking to maintain the carrier unlock you've treasured for so long can now do so on the very latest firmware.
TinyUmbrella has been updated to support the new iOS 4 on iPhone 3GS and iPod touch 2G/3G. iPad is also supported but iOS 4 for iPad isn't available yet. iPhone 3G is not supported because you don't need to save SHSH blobs for iPhone 3G, and older iPod touch (non MC model).
Good news for those of you who are in UK, France and Canada. iPhone 4 in these countries are available without contract, which means that it is unlocked so that you can use it with any carrier you want - anywhere in the world. These SIM free unlocked iPhone 4’s are available for £499 for the 16GB model, and £599 for the 32GB model in the UK, €629 for 16GB and €739 for the 32GB in France, and $649 for the 16GB and $749 for the 32GB in Canada.
Steve, the guy who was behind PushFix 2.0 (the first real fix for Push Notifications) for unlocked iPhones and Blacksn0w RC2 fix for iPhone 3.1.3 has just released Blacksn0w RC2 for iOS 4. This version of blacksn0w is basically a repackaged version of the original unlock released by geohot, and the binaries which were recently released by MSFT Guy for 05.11.07 baseband on iPhone 3GS, running iOS 4.0 GM (formerly iPhone OS 4).
We have already seen iOS 4.0 Beta 4 (formerly iPhone OS 4) being successfully jailbroken and unlocked on iPhone 3GS and 3G using ultrasn0w and blacksn0w. But for this final release of iOS 4, both the tools are likely going to get an upgrade soon to make them full compatible. The iPhone Dev Team has already promised a full carrier unlocking solution sometime this month for 05.12.01 baseband. Geohot might also update blacksn0w unlock for this latest firmware, which has already been successfully ported to the Beta 4 of iOS 4.