iPod Touch 3G – iPod3,1_4.3.3_8J2_Restore.ipsw
iPod Touch 4G – iPod4,1_4.3.3_8J2_Restore.ipsw
iPad 3G/WiFi – iPad1,1_4.3.3_8J3_Restore.ipsw
iPad 2 WiFi – iPad2,1_4.3.3_8J2_Restore.ipsw
iPad 2 GSM – iPad2,2_4.3.3_8J2_Restore.ipsw
iPad 2 CDMA – iPad2,3_4.3.3_8J2_Restore.ipsw
iPhone 3GS – iPhone2,1_4.3.3_8J2_Restore.ipsw
iPhone 4 – iPhone3,1_4.3.3_8J2_Restore.ipsw
iPhone 4 CDMA – iPhone3,3_4.2.8_8E401_Restore.ipsw
This can be jailbroken (untethered) with the same exploit that was discovered for 4.3.1. redsn0w 0.9.6rc16 fixes a 4.3.3 issue with the iPhone side switch vibration, though the exploit is the same. If you’re an unlocker, you must use a custom IPSW to avoid updating the baseband.