i was up in PDX a few weeks back, and driving around i saw this and thought, "Heh, that looks like a Banksy"
Well it turns out it is, it's the girl he did down in New Oreleans after Katrina. Doesn't carry any meaning up here in Oregon, however it does fit, in it's own way. There's also apparently the kid getting carried away with the balloons and a few others. Well done copies though, makes me wish Banksy would visit Portland.