Two weeks ago, the Dev Team released RedSn0w 0.9.10b8. The updated version of your favorite jailbreak tweak had the ability to backup your iPhone’s activation tickets. Certainly this was helpful as the tickets were a crucial part of the popular SAM unlock method.
Almost 24 hours, after Apple announced and released iOS 5.1 to the public, the iPhone Dev-Team has already updated redsn0w to version 0.9.10b6 to support a TETHERED jailbreak for non-A5 device owners that are running iOS 5.1.
Few days back, an untethered jailbreak of Corona was released enable the use of iBooks on untethered jailbroken devices. Later, a RedSn0w jailbreak tweak came to fix DRM issues with the Corona Jailbreak.