I've been wondering this same thing myself. I think there has been 3, but their files were transferred to the VO just before the closure or just shortly after. It seems that nothing is being done for PPRs for anybody applying from the U.S. If you look at the spreadsheet, almost everyone has gotten sponsorship approval, but nothing else: https://docs.google.com/spreadsheet/ccc?authkey=CLSRv0c&pli=1&key=0AshtbJBRA_XjdFN3aHBiTDNpMEZFVmoxRnc0ZWZBY2c&hl=e#gid=0