Today PIR and Afilias jointly announced that the .ORG zone is now signed with DNSSEC.
Like .GOV, .ORG is also using the NSEC3 algorithm, which means that versions of BIND prior to 9.6.0 will have problems securely resolving names under .ORG.
As Ram Mohan of Afilias noted in his message to the dnssec-deployment list, there are still significant hurdles in getting the actual registrations signed. Not many registrars accept DS records from customers yet.