A friend from college visited me a few months ago and we played a few rounds of Wii tennis and he fell in love with the game and wanted one. Then I had to break it to him that it was still currently almost impossible to buy a Wii. He recently told me a story of his coworker tracking one down:
So my friend is walking through Wal-Mart on a Sunday morning and I guess it's when the Wii shipment comes in because just as he's walking past the video game area, he watches an employee put four Wii console boxes on the shelf. He picks up a Wii box and he's reading the label for maybe 30 seconds. He looks back at the shelf, and the three other boxes are gone. Then someone taps him on the shoulder.
"You gonna buy that Wii you're holding?" says the shoulder tapper.
"Yeah, I think I am."
And he did.
Now that's consumer demand for a successful product.