Also capitalizing on this new addition is an updated Everybody Votes Channel, which can be upgraded through the Wii Shop Channel. The free update doesn't appear to have any cosmetic changes. Rather, it simply adds keyboard support for submitting questions. [Update: An update to the Internet Browser is also available through the Wii Shop Channel.]
In addition, the Wii User Agreement has been updated. It's supposed to be available at support.nintendo.com, but as of this writing, an older document from the system's launch was still in place.