Update:
Ahmadi-Roshan authored a paper on polymer membranes that offer a gas diffusion alternative to centrifuges for uranium enrichment. Reports are that he headed up that effort.
Iran has been hinting at an announcement on a new enrichment scheme and this could be it.
Iran has had significant difficulties with their P-1 centrifuges crashing and have had minimal success with their P-2’s.
Thanks for the update gandalftb.