The Financial Times suggests that, to the Bushies, a peaceful solution to the Iran crisis is not an option:

Iran ready for high-level talks, US resists

Iran has prepared a high-level delegation to hold wide-ranging talks with the US, but the Bush administration is resisting the agenda suggested by Tehran despite pressure from European allies to engage the Islamic republic, Iranian politicians have told the Financial Times.

A senior Iranian official, Mohammad Nahavandian, has flown to Washington to “lobby” over the issue, aaccording to a top Iranian adviser outside the US....

Iran’s willingness to engage the US on Iraq, regional security and the nuclear issue, is believed to have the approval of the Supreme Leader, Ayatollah Ali Khamenei....

But the White House insisted on Thursday that its own offer of talks with Iran, extended several months ago by Zalmay Khalilzad, the US ambassador to Baghdad, was limited to the subject of Iraq.

“There are none and none are scheduled,” Stephen Hadley, national security adviser, was quoted by a spokesman as saying about the prospect of talks with the Iranian delegation in Baghdad next week....

Over at the Booman Tribune, Steven D rounds up a number of articles suggesting that regime change is the only option on the table -- these guys apparently aren't going to be deterred by a little quagmire in Iraq. To those articles I'd add this one from late March:

The George W. Bush administration failed to enter into negotiations with Iran on its nuclear programme in May 2003 because neoconservative zealots who advocated destabilisation and regime change were able to block any serious diplomatic engagement with Tehran, according to former administration officials....

Lawrence Wilkerson, then chief of staff to Secretary of State Colin Powell, says the failure to adopt a formal Iran policy in 2002-2003 was the result of obstruction by a "secret cabal" of neoconservatives in the administration, led by Vice Pres. Dick Cheney

...Exactly how the decision was made is not known. "As with many of these issues of national security decision-making, there are no fingerprints," Wilkerson told IPS. "But I would guess Dick Cheney with the blessing of George W. Bush." ...

No doubt.