SHSH Blob Extractor, the program developed by iH8sn0w that gives us the possibility to save SHSH for the iOS version installed on our terminals, could be available only after Apple stops signing SHSHs for iOS 4.2.1. iH8sn0w stated this in a reply given to someone on Twitter, so his new program could be available only after the release of iOS 4.3. Why am I saying this? Because Apple won't stop signing SHSHs until after it officially releases iOS 4.3 via iTunes, so if iH8sn0w keeps his word then SHSH Blob Extractor is still far from being released.
The program is extremely useful for those who have old versions of iOS on their devices because they will be able to save SHSH for them even if Apple does not allow this. I will let you know about any new information I find about this.
