Posting on their firmware update site, Vodafone Australia announced that testing of the GDR 2 update for the HTC 8X has been completed, and is just awaiting release by Microsoft.
Unfortunately the more complex Nokia Amber release of the Nokia Lumia 820 is still in testing, and for some reason the update for the Nokia Lumia 720 has not been submitted yet.
It seems by keeping it simple HTC may beat Nokia out of the gate with the new software. Hopefully it will not be like Samsung did, by leaving out important features such as Datasense and the FM Radio support.
See the page at Vodafone Australia here.
Thanks brent3000 for the tip.