Nintendo released a new version of the Wii Shop Channel along with the new IOS62 which will be required for the Shop Channel.
Source: http://www.wiibrew.org/wiki/Wii_Shop_Channel
IOS info: http://www.wiibrew.org/wiki/IOS62
Source: http://www.wiibrew.org/wiki/Wii_Shop_Channel
IOS info: http://www.wiibrew.org/wiki/IOS62