Yesterday a user of this blog told me that Apple would still sign SHSHs for iOS 4.1 and during the evening other sites confirm the same. It seems that in the case of certain devices we can still save SHSH for our terminals and the big exception is the iPhone 4 for which, for one reason or another, SHSH cannot be saved for now. iPhone 3G/3GS, iPod Touch 2G/3G can be brought back to iOS 4.1 if you download TinyUmbrella now and save a SHSH, but for iPhone 4 it is not possible and for the rest of the devices no one knows. Do not try to save SHSH for iPad 2 because iOS 4.1 does not exist for iPad 2.
I tried to save an SHSH this morning for the iPhone 3GS and I can confirm that it worked 100% without any problems, so you can save now if you haven't done it yet. To save an SHSH you must download TinyUmbrella from here, uncheck the Request SHSH from Cydia option from the Advanced menu and wait for the program to save the necessary files.
