The 2007 National Intelligence Estimate which stated that Iran does not have a military nuclear program has, to my best knowledge, never been publicly confirmed by the Obama administration. But two released diplomatic cables indicate that the NIE's conclusions are still considered to be correct.
In November 2007 a U.S. National Intelligence Estimate concluded (pdf):
• We assess with high confidence that until fall 2003, Iranian military entities were working under government direction to develop nuclear weapons.
• We judge with high confidence that the halt lasted at least several years. (Because of intelligence gaps discussed elsewhere in this Estimate, however, DOE and the NIC assess with only moderate confidence that the halt to those activities represents a halt to Iran's entire nuclear weapons program.)
• We assess with moderate confidence Tehran had not restarted its nuclear weapons program as of mid-2007, but we do not know whether it currently intends to develop nuclear weapons.
In an embassy cables released by WikiLeaks the Obama administration confirms the NIE conclusion and states that Iran does not have any active military nuclear program. In another cable the Turkish Defense Minister states, undisputed by Secretary of Defense Gates, that there is no evidence at all for any Iranian military nuclear program.
A November 2009 cable with official talking points on U.S. missile defense policy states:
We continue to assess that Iran, at a minimum, is keeping open the option to develop nuclear weapons. Tehran could choose at any time to restart its nuclear weapons program and, eventually, arm its missiles with nuclear warheads.
A February 2010 cable reports on a meeting between Secretary of Defense Gates and the Turkish Defense Minister Gonul:
Turning to Iran, Gonul cited the enrichment program and acknowledged that Ankara is "concerned about the Iranian threat," but said that the international community does not yet have evidence that there is a weapons program.