TinyUmbrella 4.21.13 was released by Notcom, developer of TinyUmbrella. The new version of TinyUmbrella 4.21.13 includes the support of iOS 4.3 GM. This can be used to save iOS 4.3 GM SHSH blobs. It also uses your proxy settings while running the TinyUmbrella loader. According to Notcom, from his blog

TinyUmbrella 4.21.11 has been released and is available for Download. Notcom has released this. It includes the solution to bandwidth usage problem. TinyUmbrella 4.21.11 can be used to save iOS 4.2.1 SHSH blobs According to Notcom on TinyUmbrella 4.21.11 Release

TinyUmbrella 4.21.08 version beta has been released by a developer called Notcom. This new beta version of TinyUmbrella will support Verizon iPhone 4. NOTE: This is a beta version so be cautious when you use it. TinyUmbrella 4.21.08 beta version is available for download for both Windows and Mac OS X. According to Notcom developer [...]