Iran's ambassador to the UN Javad Zarif is considered one of the respected diplomatic stars of the regime

How Not to Inflame Iraq - New York Times
Incidentially, an informed Iranian colleage indicates that Javad Zarif is about to be replaced, which cannot be good news for those who suggest the US and Iran need to talk.

Read Zarif's article juxtaposed to this Gordon piece from the NYT, which gives above-the-fold coverage to Iranian shaped-charges being provided Shi'i groups. Perhaps the most interesting comment in the article is:
“It is the most effective I.E.D out there,” said Lt. Col. James Danna, who led the Second Battalion, Sixth Infantry Regiment in Baghdad last year, referring to improvised explosive devices, as the roadside bombs are known by the American military. “To me it is a political weapon. There are not a lot of them out there, but every time we crack down on the Shia militias that weapon comes out. They want to keep us on our bases, keep us out of their neighborhoods and prevent us from doing our main mission, which is protecting vulnerable portions of the population.”

A window in the internal debate in the Bush administration is this piece, which highlights arguments for cooperating with Iran versus the case for confronting Iran as a "sponsor of terrorism."

"Since al-Qaeda fighters began streaming into Iran from Afghanistan in the winter of 2001, Tehran had turned over hundreds of people to U.S. allies and provided U.S. intelligence with the names, photographs and fingerprints of those it held in custody, according to senior U.S. intelligence and administration officials. In early 2003, it offered to hand over the remaining high-value targets directly to the United States if Washington would turn over a group of exiled Iranian militants hiding in Iraq.

"Some of Bush's top advisers pushed for the trade, arguing that taking custody of bin Laden's son and the others would produce new leads on al-Qaeda. They were also willing to trade away the exiles -- members of a group on the State Department's terrorist list -- who had aligned with Saddam Hussein in an effort to overthrow the Iranian government.

"Officials have said Bush ultimately rejected the exchange on the advice of Vice President Cheney and then-Defense Secretary Donald H. Rumsfeld, who argued that any engagement would legitimize Iran and other state sponsors of terrorism. Bush's National Security Council agreed to accept information from Iran on al-Qaeda but offer nothing in return, officials said."

Also relevant is the Unger piece in Vanity Fair: "Everything the advocates of war said would happen hasn't happened," says the president of Americans for Tax Reform, Grover Norquist, an influential conservative who backed the Iraq invasion. "And all the things the critics said would happen have happened. [The president's neoconservative advisers] are effectively saying, 'Invade Iran. Then everyone will see how smart we are.' But after you've lost x number of times at the roulette wheel, do you double-down?"