Don't Worry. We've Got You Covered.
Due to overwhelming demand, we have recently stopped taking pre-orders for the Wii U. Don't worry, because we are now offering PowerUp Rewards members the opportunity to get on a wait list for the new Wii U system. Head to your local store now and talk to a Game Advisor to be added to the list. No deposit required!
While we can't guarantee when your system will be available, we'll send monthly updates to keep you informed of any Wii U developments.* So stay tuned and keep opening those emails. The next one could be your invitation to come pick one up!
Source
Got this in a email from GameStop.