iH8sn0w has updated sn0wbreeze to version 2.5 to support the recently released iOS 4.3.1 untether. If you’re interested in rolling your own IPSW, hit the source and give it a whirl. Multitouch gestures are included with the jailbreak, as well as support for the Apple TV 2.
sn0wbreeze 2.5 (for 4.3.1) now at http://ih8sn0w.com [Props to @i0n1c for the untether!].