There is word that under Obama, companies that do business with Iran that help their missile or nuclear programs will no longer face sanctions. The reasoning is that the sanctions are hindering the talks and to not seem to be having much of an impact on the programs.
If they are not working there are still reasons to keep them. Just because the sanctions are not hindering the programs does not mean that you should lift them resulting in a possible boost to the programs. It is also among the strongest an clearest messages a country can send that does not involve military action.
The goal still seems to be preventing Iran from going nuclear, the difference here being a tactical change. With the tactical change, success or failure now lay squarely with Obama.
More at http://gatewaypundit.blogspot.com/2009/02/breaking-intelligence-report-obama-to.html.