Pittman is retired and I'm told isn't really interested in getting back into things, at least not now.
The two names I've heard that I believe are the most involved are Vanderbilt's Chris Klenakis, who has ties to the Wommacks and also was Chris Ault's OC/OL coach during the time Ault invented the Pistol offense at Nevada, and Missouri's Brandon Jones.
There is also a bit of attention on Eric Mateos, who was recently hired at Wisconsin but has prior ties to the SEC when he was Arkansas' OL coach under Sam Pittman and also coached at LSU.
I'm a little less sure about Mateos than the other two, but hiring either Klenakis or Jones would be "home run" territory for me.