Apple released iOS 4.2.2 (err, 4.3?) for the Apple TV 2 earlier today, and i0n1c was quickly able to port his 4.3.1 untether—which refuses to die—to support it. An updated PwnageTool bundle is available to jailbreak the device, along with a fresh release of sn0wbreeze. The Apple TV update only contains minor changes, so if you don’t feel like fooling around with IPSWs, you’re not missing out on much.
Update #2: Apple released a minor update to iOS 4.3 for AppleTV2G (the IPSW name still says 4.3, but the build version changed from 8F202 to 8F305). @i0n1c was once again able to quickly port his original 4.3.1 untether (the exploit that wouldn’t die!) to this version.
If you do feel like updating to the “new” 4.3 (although there doesn’t seem to be any good reason to), you’ll need to drop this bundle into the correct folder in PwnageTool.app. If you don’t know how to do that, there are lots of tutorials on the web, and we’d be glad to help in the comments below.
Thanks once again, @i0n1c!