The latest RedSn0w update- RedSn0w 0.9.10b7 has just been released and is available for download. RedSn0w 0.9.10b7 contains a number of useful features that makes this update worth trying.
The updated version of RedSnow include the implementation of Corona untethered, re-installing the Corona jailbreak for those who accidentally uninstall it and Redsn0w can pull your SHSH blob from your Cydia Store when attaching an IPSW. Over and above, RedSn0w can inform you whether your iPhone 3G has a vulnerable baseband boot loader, an old exploit bookroom and can provide you with a generous amount of useful information about your device.
RedSn0w 0.9.10b7 is compatible with both Mac and Windows. You can download it through the link below.
Download RedSn0w 0.9.10b7: