Nintendo Enthusiast goes hands-on with the Wii U and are happy to report it was awesome! (Lots of media)

[sethnintendo]

lilbroex said:

It couldn't have been standard for all of them. It wouldn't have made sense for NIntendo to sale the game seperately in the first year or 2 if it came with every single system. Everyone would have had it already, guaranteed.

It also wouldn't explain why my Wii didn[t come with Wii Sports.

"The game was first released in North America along with the Wii on November 19, 2006, and was released in Japan, Australia, and Europe the following month. It was included as a pack-in game with the Wii console in all territories except Japan,[3] making it the first game included with the launch of a Nintendo system since Mario's Tennis for the Virtual Boy in 1995."

http://en.wikipedia.org/wiki/Wii_Sports

 

Can't tell you why your Wii didn't have one but it was a pack in with the console since launch in USA.  The only way you could obtain another copy till they released it as a Nintendo Select was through their website.   If you are from Europe then I would assume the same scenario.