iH8sn0w issued Sn0wbreeze 2.3b1 for Windows , which allows you to jailbreak tethered devices with the new iOS 4.3. Latest version of Sn0wbreeze supports iPhone 4, iPhone 3GS, iPod Touch 4G, iPod Touch 3G & iPad 1. The jailbreak is tethered type and you must use the utility iBooty to start the device. You can download sn0wbreeze 2.3b1, from this link .
Warning: this is a version BETA, not definitive. We therefore recommend the use of the tool only for developers who want to make their applications compatible iOS 4.3.