RedSn0w 0.9.5 can still jailbreak the iPhone 3G and the iPod Touch 2G (non MC) on the iOS 4.0.2 firmware, according to a tweet by MuscleNerd.
To jailbreak your device use this version of RedSn0w simply follow one of the tutorials below and select the 4.0.0 instead of the 4.0.2 firmware when using the application.
