You can use this redsn0w from June to jailbreak 4.0.2 on iPhone3G and iPod2G(non-MC version). Just point it at the 4.0 IPSW (the public one, not the developer GM one). (Yes – point it at the 4.0 IPSW even though you’re at 4.0.2).
iOS 4.0.2
Posted inNEWS
Apple Drops iOS 4.0.2. Jailbreakers And Unlockers DO NOT Update
The new update might bring some minor bug fixes, but its true aim is to block the Safari exploit used by JailbreakMe. If you need to jailbreak and unlock your iPhone, DO NOT UPDATE.
FSM EXCLUSIVE DEAL
Posted inHOWTO / NEWS
Apple To Drop iOS 4.0.2 In A Few Hours. Save Your SHSH Blobs And Avoid Updating
Just a quick heads-up: It seems that Apple will push iOS 4.0.2 in a few hours. This is not a major update, and it has only one aim: to block the Safari vulnerability that allows JailbreakMe to jailbreak all iOS devices.