As a non-US-er, we sometimes look down on the US for having a gun obsession, but there's no way anything OWS does would escalate to the point of seriously grabbing everyone's attention like, say, building an army, storming a building and forcibly arresting a CEO. They say OWS is inspired by the Arab Spring[1][2], but that would be a pretty tame example compared to the revolutions in Egypt and Libya. The people in OWS are upset, but not desperate, and I'm not sure this can lead to any sort of radical change unless the 1% agree voluntarily, which is obviously unlikely. It's very hard to think of a non-violent way to actually incite some change.
"The USA should invade the USA and win the hearts and minds of the population by building roads, bridges and putting locals to work." - Paul Myers
As a postscript, the amount of copycat protests are also slightly embarrassing. It's great to show solidarity, but for instance I don't think there needs to be one for my town. It's just awkward and trivialises the situation, since our economic problems are negligible compared to the US.
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1. https://secure.wikimedia.org/wikipedia/en/wiki/Arab_Spring