Unfortuately the people who walked our streets in order to protest the war in Iraq didn't reach their objective. I think the main reason for this failure was the choice of walking on America streets- if instead they had protested in Iraq they might have been successful. Another problem was their timing, they should start protesting before the US gears up to conduct a war. So they need to plan ahead. Fortuately, Bush has already given a heads up as far as future threats to world security (Axis of Evil), and of these countries I would think that N Korea would be the best next choice.
So these war protesters should start planning on bringing lots of protester over to N Korea (and also bring lots of food, cause there is a shortage over there). Now, to be successful there will need to be lots of people (at least 10,000) and these people must have enough courage to stand up against a evil regime. By using non-violent and having some message like "reduce the soldiers on the border" or "feed the starving people" or something. Also they will need to line up the press.
They could pick Israel instead, but probably that problem will be worked out before they could get there.