The Dev-Team updated redsn0w to version 0.9.6b4 today. This version provides an untethered jailbreak of iOS 4.2.1 for iPhone 3G, older iPhone 3GS, and non-MC iPod touch 2G, and a tethered JB for the iPhone 3GS (new bootrom), iPhone 4, iPad, iPod touch 2G (MC model), iPod touch 3G and the iPod touch 4G. We advice you to update iTunes to 10.1 before you jailbreak using Redsn0w 0.9.6b4. » Jailbreak 4.2.1 With Redsn0w 0.9.6b4

Yesterday Apple Released iOS 4.2 Gold Master For Developers and it turns out Redsn0w 0.9.6b2 can jailbreak it. All you have to do is point redsn0w to the 4.1 IPSW instead of 4.2. If you are planning to jailbreak, make sure to uncheck the Cydia box, because many apps “including Cydia” need to be updated for 4.2. Unlockers should stay away.

There is a new app in Cydia, called Musicdog. Musicdog is a new and free music streaming application which requires iOS4+. You can search among 100,000+ songs, suggest songs, check out the top rated tracks and it also supports multitasking. All you need is a account, login and you are ready to stream free music. » Musicdog: Streaming Free Music [jailbreak]

There are a lot of new developments in the jailbreaking scene, this time the Chronic DevTeam just pushed greenpois0n RC4 which comes with support for the iPod Touch 2G, MC and MB, both untethered. It is available for Mac and Windows users, Linux users have to wait a little longer because p0sixninja said ‘Linux version will be posted after I get some sleep, sorry!’. » GreenPois0n RC4 Has Just Been Released [jailbreak]

The Chronic Dev team has just released the Mac version of the jailbreaking tool, Greenpois0n. Its just like the Windows version, it will tell you what you need to do to get your iDevice into DFU mode and all you need to do is hit one button on your Mac to jailbreak your iDevice. You can get Greenpois0n here. » Greenpois0n: Mac Version Now Available. [jailbreak]

MuscleNerd from the Dev-Team posted an interesting tweet on his Twitter page, saying it will be possible to jailbreaks all future A4 firmware’s. “Think we’ve figured out a way to extend PwnageTool+limera1n+@comex hacks to untethered JBs for all future A4 firmwares” says MuscleNerd. » Untethered Jailbreaks For All Future A4 Firmware’s [jailbreak]

These days there are so many jailbreak and unlock tools for your iDevice, that it can be a pain to find out what tools are capable of jailbreaking/unlocking your iDevice. Well for the guys that don’t know what tools to use there is a wizard to help users find the correct jailbreak tool for their iDevice. Check out the wizard here. » iDevice Jailbreak And Unlock Wizard [jailbreak]