Hey fellas, a good news from @musclenerd regarding the A5 jailbreak (iPhone 4 and iPad2). According to the iPhone Dev Blog Corona A5 jailbreak is almost done and we can probably expect this weekend if my predictions are right. As you might know Corona is a wonderful jailbreak tweak used in iOS 5 A4 processors to convert the tethered jailbreak to untethered just by installing the package from Cydia. For the time Corona will get a GUI that will be compatible for both Mac and PC, sorry Linux users.

Here are some useful information from the Dev Blog

Jailbreak programs:

To be as flexible as possible, the A5 version of the corona jailbreak will take multiple forms:

• Chronic Dev have incorporated the overall flow into a GUI that runs on your Mac or PC
• iPhone Dev have incorporated the exact same flow into a command-line interface (CLI).  This will allow us to help users through individual steps of the jailbreak manually, to both help the user and help improve the overall flow.  Although the CLI will also allow the user to perform the entire jailbreak from beginning to end, we anticipate it will be more useful in debugging the occasional errors.  The CLI currently has over 20 individual options (in addition to the single “jailbreak” option) that should be useful during debug after the GUI release.
• Once all the bugs in the flow are worked out, we’ll also incorporate it into the redsn0w GUI (but still leave the CLI freely available too).  In order to maximize the chances of the jailbreak working for everyone, the redsn0w GUI will use native Apple iTunes libraries — this technique is slightly different than how the Chronic Dev GUI handles communications, and should provide nice combined coverage for all the odd computer configurations out there.

Supported firmware version:

• iPhone4S: 5.0 (9A334), 5.0.1 (9A405) and the “other” 5.0.1 (9A406)
• iPad2: 5.0.1 (9A405)