Today is the iPhone OS day or should I say jailbreak 3.1.3 day without any doubts. It is just beginning of the day here and already jailbreaking stuff for the just launched iPhone 3.1.3 have started to surface on the internet. The ever talented iPhone Dev team has unleashed redsn0w 0.9.4 as the jailbreak tool for iPhone 3.1.3. The tool like its previous version is available for Windows and Mac platform. This tool as quoted by the team themselves is released specifically for older iPod Touch 2G (the non MC one) users.

You can use this tool to
You might be interested to check out the following links:
How to jailbreak iPhone 2G running on iPhone 3.1.3 using redsn0w 0.9
redsn0w 0.9 jailbreaks iPhone 3.1.3 on certain devices
iPhone 3.1.3 released, brings bug fixes only
Download redsn0w 0.9.4 for Windows
Download redsn0w 0.9.4 for Mac
Update 1: SnowBreeze 3.1.3 has been released which brings jailbreak for iPhone 3.1.3 running on iPhone 3GS, iPhone 3G. More details can be found here.
Update 2: SnowBreeze 3.1.3 has been updated to the final version v1.4. The final version brings jailbreak for iPod Touch 1G and brings fixes for iPhone 3G. Details here
Update 3: PwnageTool for jailbreaking iPhone 3.1.3 has been released. The updated version PwnageTool 3.1.5 brings iPhone 3.1.3 jailbreak for Mac users. Details here