Nintendo of America has told us that many of the network-reliant Channels on the Wii will go out of service on that date, including the Forecast Channel, News Channel, Everybody Votes, Check Mii Out, Nintendo Channel, and data exchange between friends. Mii exchanges and Wii Message Board conversation functionality will also go offline.
Other services will remain active for the time being, including the money one, the Wii Shop Channel,