Looks like it's going to pass... Elections WA State
But even if the Measure passes, as it seems it will, this particular case will have additional repercussions as the judicial branch grapples with the privacy issues raised earlier this year, as diaried somewhat extensively here earlier. (well, here, specifically)
Remember to keep an eye on this issue. If right-wing entities are able to quietly change decades-old petition laws, efforts like that witnessed in CA for Prop B could become quite a lot more common.