TinyUmbrella has been updated with support for saving your iOS 4.3.1 SHSH blobs
TinyUmbrella now supports 4.3.1 for the relevant devices. Currently only iPhone 4 for verizon does not have 4.3.1 support (as there is no 4.3.1 available for the verizon iphone). Enjoy!
Windows and Mac Version Available.