Seattle is about the only area thats kind of staying out of the whole arguement. A lot of the counties and cities have already put moratoriums on coop grows. In order to have a coop grow you have to be inspected an licensed and with all the moratoriums thats not going to happen. For now its better just to grow for yourself and one patient to stay within the only part of the law that is clear.
Also its important to point out to people planning on moving here that MMJ is still illegal in Washington. It only gives you the opportunity for a defense in court. That means that you can still be arrested for any amount of cannabis and have to go to court to prove you can grow legally.
Like most states theings are still pretty screwed up here in Washington