This article, They Wouldn’t Really Attack Iran, Would They?, is a good analysis of the situation;
"Will they attack Iran sometime this or next year? If I were a betting man, I’d put my money on Washington standing down. It seems like too crazy a proposition even for Bush and Chenet at this point. But who knows? I didn’t think they’d invade Iraq at first and I’m not into prognostication. It’s not about the crystal ball."