The Arkansas portion is complete. Goes from Memphis to Helena, where it crosses into Mississippi.
It's possible to go skip the Arkansas section by utilizing the Mississippi Alternate route I've mapped out. See here: http://www.advrider.com/forums/showp...3&postcount=94
[edit June 19, 2013: Version 3 of the route (hopefully) fixes a couple of weird issues I've had with via points disappearing.]