From Pentax Forums, Adam (owner of PF site) wrote a letter to Pentax presenting the case for a FF DSLR, and it seems the slumbering Pentax Gods gave an omen... (I mean just a reply from the usually uncommunicative corporate high ups )
Pentax Full Frame - An official statement from Pentax (they listened!) - PentaxForums.com
Pentax Full Frame - An official statement from Pentax (they listened!) - PentaxForums.com