Every time a new method for jailbreaking is announced, you know there must be an exploit in the OS. Apple will surely fix the exploit with an OS update, but as an effect customers won't be able to use jailbreak with that version. And so it becomes a question of whether you choose freedom or safety.
The jailbreak for iOS 1.1 based on the TIFF vulnerability also had a side-effect of patching the vulnerability itself[1] -- does jailbreak.me (or another party) do the same?