TinyUmbrella 4.30.05 is now available for download. Notcom has released TinyUmbrella 4.30.05 to save SHSH blobs for iOS 4.3.1 It also supports the iPad 2. You can download TinyUmbrella 4.30.05 from the link below.
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!