There's still no offical support for Netflix instant view on the Wii. But with PlayOn you can get it on you Wii.
Third-party Wii video-streaming service beta begins - News at GameSpot
it's VERY easy to setup and the quality is very watchable. It does lag sometimes for me and the quality isn't DVD at all but it works and that's all that really matters. So far I watched some of Lost, Dexter and Nick and Norah's on it.
Anyways right now the service is in beta for two weeks, after that we got to wait until it's officially released. They still got some bugs to work out namely quality control stuff and optimization, but otherwise they got it in the bag. They got their service out before Nintendo or Netflix could so you can be sure they are going to be rolling in money.
Either way, at least there's a use for my Nintendo Wii.