As you know, iOS 4 GM was already jailbroken using Redsn0w 0.9.5 Beta 5 and it added a lot of new features as Battery percentage, Multitasking availability, and more! So, I expect from iPhone Dev Team to release the final Redsn0w 0.9.5 in the next hours to Jailbreak the final iOS 4 final version which was released from minutes..
Also, There’s unlock confirmed to Unlock iOS 4 on Baseband 05.12 and 05.13 (may be on iPhone 4) will be released in the next days when iPhone 4 Shipments arrive. So Stay tuned for the newer Versions of Jailbreak and Unlock for iOS 4.
Update 1: My exceptions are right, iPhone Dev Team has just tweeted that Something big is coming in which they mean a Jailbreak for iOS 4
Something big coming 🙂 Thanks to @sherif_hashim for this crash (and keeping it quiet til ready!)