Old Policy

"To ensure that your Wii Console is operating properly and efficiently, we may download updates, patches, upgrades and similar software to your Wii Console. In addition, we may disable unauthorized or illegal software that has been placed on your Wii Console without notifying you where necessary, in order to comply with applicable laws, assist law enforcement, protect us and our customers, and prevent the use and distribution of software obtained through improper channels."

New Policy

"We may without notifying you, download updates, patches, upgrades and similar software to your Wii Console and may disable unauthorized or illegal software placed on your Wii Console to ensure that your Wii Console is operating properly and efficiently, comply with applicable laws, assist law enforcement, protect us and our customers, or prevent the use and distribution of software obtained through improper channels."

All in all, it looks like Nintendo is just trying to be sneakier with their updates. This should help them in getting the jump on pirates.

Link