GameStop.com is now officially sold out of the Black Wii U Deluxe Set bundle, which has a MSRP of $349.99. The site is still taking pre-orders on the White Wii U Basic Set though, which has a MSRP of $299.99.
It took GameStop.com less than 48 hours to reach their limit of Wii U Deluxe Sets available for pre-order. If you have not pre-ordered a Wii U at your local GameStop store and plan on doing so this weekend, you should probably call the store before heading out if that is the only reason you are going.
If you are looking to pre-order/reserve the Black Wii U Deluxe Set online, you might want to check sites like BestBuy.com and ToysRUs.com.