Okay, Rumsfeld is out, Cheney is in his cave, here’s what you do:
Put the worst secretary of State since Colin Powell on a plane to Tehran. Have her tell them that we will leave Iraq and shut up about their enrichment of uranium to 3.6% for their electricity program as long as they remain subject to the NPT and IAEA safeguards, and promise not to obliterate the minority Sunni Arabs of Iraq when we leave.
Since the Ayatollah Khamenei offered everything for nothing in 2003, I think it’s a pretty safe bet that he’ll take it.
Otherwise, the US could just leave them alone since Iran is really none of our business, but that’s just me.