With no other purpose other than to close the recently discovered and hugely popular security hole used in the recently released jailbreakme.com 3.0 jailbreak, Apple just launched iOD 4.3.4. Unless you have some self esteem issues if you do not have the latest update, my advice is to stay away, even if you don’t intend to jailbreak right now. Also, always behind version wise, Verizon’s iPhones get version 4.2.9 with the same fix.
So again, the only purpose of Apple’s new iOS versions is to close the existing security hole that allows the current jailbreak. You have been warned!
In case you were living under a rock, the new Jailbreakme 3.0 is a userland jailbreaking method that for the first time worked on the iPad 2 devices (and everything else) running iOS 4.3.3.