Remember the iOS 4.0.2 from Apple that will be used to patch the PDF exploit known as JailbreakMe? Well, if you happen to have an iPhone 3G or iPod touch 2G lying around, it can be jailbroken using the current version of Redsn0w – all the explicit details are explained in the guide here, but bear in mind that this is just for testing and educational purposes only since you will be held responsible for any loss of important data or having your iPhone malfunction should Murphy strike during the entire process. Do you have the intestinal fortitude to go ahead? Nice to see older devices not being left behind the game in this aspect.