I found John Pilger's article in the Mirror (UK) to be an eloquent, moving argument against the looming war, maybe the best I've yet read, and I recommend that everyone here read it in its entirety.

A sample:

"The power of public opinion, both moral and political power, is far greater than many people realise. That's why Blair fears it and why, through the inept Tessa Jowell, he tried to ban tomorrow's demonstration. He fears it because if the voice of the people threatens the house of cards he has built on his obsession with Iraq and America, it may well threaten his political life and make mockery of the Anglo-American "coalition" and deny the Bush gang its fig leaf.

"Should that happen, American public opinion, now stirring heroically after the most sustained brainwashing campaign for half a century, may even stop the Bush gang in its tracks. As of yesterday 42 American cities had passed resolutions condemning an attack."

~
sp

note: I'd like to blame a bad left shift key and the Apple II-like 40 column input window (under my IE 6) for my recent spate of typos, but the flubs stop (and start) here, so my apologies.