During the last evening, version 2.7.2 of sn0wbreeze was released, which brings compatibility with the new iOS 4.2.2/4.3 of Apple TV 2G released last night by Apple. iH8sn0w implemented i0n0c's exploit in sn1wbreeze untethered, so all Apple TV 2G owners can now untethered jailbreak without problems. Unfortunately, the new version of the application does not bring anything new for the rest of the iDevices owners, so if you had problems after restoring to iOS 4.3.3 using a custom ipsw made with sn0wbreeze, you will have to wait.
You can download iOS sn0wbreeze 2.7.2 from here.
