For those of you who have not seen it looks like the PMW-300 and 400 firmware upgrade for xavc is out at least in Australia.

Now I am unfortunate enough to be here in the states where there is no update to the sony website. Can anybody answer for my own edification is the same software we will see here in the states in what is presumably another 2 months? Would it even be safe to install on a camera or would said camera be turned into an expensive brick in the process? either way I will probably wait until the official US release but it is something I would like to know for future reference.