In case you’re worried you might not get your hands on the Wii U before the end of the year due to shortages like the Wii faced, Reggie Fils-Aime has explained that they have “learned a lot of lessons from the launch of the DS, the launch of Wii and the launch of 3DS”, and:
…our supply chain is solid. My job is to work with retailers, work with other business partners to create demand for the product, and have the consumer get excited. And I think we’re well on the way to doing that.
Of course, they don’t want to flood the market with the product, so I still expect there to be difficulty getting the system at all locations. Total sell-outs don’t do them many favours though, so I think they’ll have it covered for the most part.