Iranian Banks to be Cut Off from the Global Financial System

The screws are tightening on the Iranian regime.  Yesterday, Belgium-based SWIFT (Society for Worldwide Interbank Financial Telecommunication), which provides the network allowing banks to move money around the world, announced that it was ready to block Iranian banks from using its network.  Combined with the US Government's previous act to cut off Iran's access to dollars, the financial noose around the regime is clearly tightening.  Iran sent a letter indicating that it would like to resume talks over its nuclear program, so perhaps the sanctions are biting deeply enough that Iran is now serious about a negotiated solution?