The Director of National Intelligence just released an Estimate report (NIE) pertaining the nuclear weapons program in Iran. The office coordinates all 16 U.S. intelligence agencies, and its findings now replace the previous (2005) claims.
Two the main findings:

1) NIE judge with high confidence that in fall 2003 Tehran halted its nuclear weapons program and that the halt lasted at least several years. NIE is also moderately confident that the nuclear weapons program had not restarted as of mid 2007, and that the halt was directed primarily in response to increasing international scrutiny and pressure.

2) NIE judge the earliest possible date Iran could be technically capable of producing enough highly enriched uranium (HEU) for a weapon is late 2009, and even that is very unlikely. Iran could be technically capable of producing enough HEU for a weapon sometime during the 2010-2015 time frame. (Bureau of Intelligence and Research judges that it would be unlikely before 2013 because of foreseeable technical and programmatic problems.)

You can read the original here:
http://www.dni.gov/press_releases/20...terstitialskip