Posted on Ask Sideshow 10/27/10:
"Okay, you may want to sit down for this… We have indeed started development work on a Short Round figure in 1:6 scale. We’ll be taking it slow, developing Indy, SR, and other TOD characters for release a little further down the road – but we have commitments…"
Yes, over 18 months ago, and they have since mentioned something about hitting a snag in development on Shorty - the body I believe. This Ask Sideshow answer was probably posted only a few months after they bought the head from Trevor.
There hasn't been a peep from Sideshow about TOD stuff in well over a year, but I still feel that the planning for the Mine Cart and Shorty were meant to tie into a HT TOD Indy release late this year... which may not happen now due to the HT ROTLA Indy response.