I just talked with my local guitar store (after having tried unsuccessfully to place an order over the weekend). After talking to their Mesa dealer, the rep was suggesting that these would not start to be manufactured until Mid February. There was no estimate on how long it will take to process the orders but my expectation is not to see mine until late March early April, perhaps longer.
I am really pumped about getting one as I missed the final Mark IV's by a few weeks, and my expectations are high, but when it comes to getting it in my hands I am trying to be realistic. Hopefully the turn around is much faster.