A few days ago Model 3 configrator on Tesla.com website was updated. Now it includes information on a Standard version battery and dual-motor versions launch.
After the paintjob and wheels design screen Model 3 reservation holders see the screen where they are able to choose from Standard and Long Range versions – deliveries of the former are stated to begin in early 2018. The all-wheel drive and dual-motor option is located on the same screen and is announced to be launched during this spring.
Here are several configurator screenshots.