Seas0nPass has been updated to perform a tethered iOS 4.3 jailbreak on the Apple TV.
Seas0nPass has been updated to support a tethered jailbreak of the new AppleTV 4.2 (iOS 4.3) software. Big thanks to @nitoTV, @DjayB6, @p0sixninja and @msft_guy for help getting everything together.
Is aTV Flash (black) Beta3 compatible?
For the most part yes. However, you may see a few oddities with text entry screens in plugins like Couch Surfer and nitoTV. These are relatively minor issues and should be a quick fix.
Additionally there are some hardware decoding issues present in XBMC which will take a bit more work to get right.