The iPhone Dev-Team has announced that they will release updated versions of both RedSn0w and PwnageTool to provide an untethered jailbreak for iOS 4.3.1.
Instructions on how to jailbreak and unlock your iPhone 3G on iOS 4.2.1 firmware using RedSn0w for Windows. This tutorial will show you how to upgrade your baseband if needed for unlocking.
iH8Sn0w says there is a possibility an untethered jailbreak will be released for iOS 6.1.3/6.1.4 and recommends staying on iOS 6 or downgrading back to iOS 6 if you are already on iOS 7.
Dual Electronics announced today that their GPS Navigation & Battery Cradle for iPod touch (model XGPS300) will be available at retail later this month.