Sounds icky, but I have every confidence that the 9th Circus will do the right thing here.
If it did stand, all the way to the Supreme Court, it could very negatively affect everything that we're doing. It would make the Wikipedia non-profit vulnerable to a lawsuit based on the actions of a user, which would mean -- in practice -- that we'd have to police things a lot more centrally, etc. It'd be crushing to our whole development model.
But, I'm not too worried. This sounds like it'll be a slam-dunk on appeal.