PwnageTool for firmware 3.1.3 will be released soon, but do not rush to upgrade

MuscleNerd, a member of the DevTeam, posted an interesting tweet. He claims that a new version of PwnageTool to jailbreak the Firmware 3.1.3 will be released soon.

However he also warns the owners of an iPhone 3G or 3GS, suggesting not rush for firmware update. In other words, the improvements of firmware 3.1.3 are minimal, so if you are comfortable with firmware 3.1.2 just stay with that.