Current version of Redsn0w 0.9.6 can now be used to jailbreak the newly released iOS 4.3.3 and this is a tethered jailbreak that means you will have to boot your iOS device in tethered state on every reboot on iPhone 4, iPhone 3GS, iPod touch 4G, iPod touch 3G and iPad.
Please note that if you rely on unlock, then please stay away from iOS 4.3.3 until further notice.
Things to Download
Download iOS 4.3.3 for iPhone 4, 3GS, iPod touch iPad,
Download iOS 4.3.2 for iPhone 4, 3GS, iPad, iPod touch
Download Redsn0w 0.9.6rc14 for Windows
Download Redsn0w 0.9.6rc14 for Mac
Download iTunes 10.2.2 for Windows or Mac