On Friday, Nintendo shut down a number of Wii servers, right on time based on the announcement made back in April. The loss of these servers effectively makes the following channels useless: the Nintendo Channel, News Channel, Forecast Channel, Everybody Votes Channel, and Check Mii Out Channel.
The ability to exchange data with Wii friends is also now nonfunctional. This channel’s closing will also affect the Wii messages on the Wii Message Board, exchange of Miis on the Mii Channel as well as message and data exchange within some games.
The Wii Shop Channel is not going to be affected by the servers shutting down and is not planned to go offline anytime in the near future. Wii U owners will still be able to access it from their consoles as well when they are in Wii mode.
Nintendo apologized to people still using these services in their official announcement back in April. They also thanked Wii owners for their continued patronage of Nintendo products and services.
With Wii U having been out for almost a year now, and Wii beginning to age out, it is likely that more service cancellations will roll out in the future.