About the best answer that won't come from Atlas directly is, "Soon!"
They posted three months ago that they were finalizing the first shipment and that it would be available near Christmas. I would expect an announcement of widespread availability in the new year, maybe February.
Last word I got directly from Atlas about three weeks ago was that Code 83 products would start hitting there shelves 2/13. Code 100 was coming first and I have heard that it is happening now.
Wayne
The information I posted above was from my Distributors site which showed they have current stock of Atlas [Atl] Code 83 True Track in stock at present in all the various items.
I'll make interested individuals a good deal price wise.