3rd-party sales figures for the Wii...

[Bodhesatva]

BengaBenga said:
What's so special about Mario & Sonic?

It's a Sega title, and thus 3rd party, despite having Mario in it.
The profit will go mainly to Sega.

This is precisely my opinion. If anything, it needs to counted twice.

Mario and Sonic at the Olympic is the first game in which Nintendo allowed a third party company to develop and publish a game with Mario in it. It's effectively the equivalent of Microsoft offering a financial stipend for development; they gave Sega an extra 500k sales, easily, by including the biggest mascot in gaming. 

Far from not counting as a third party title, Mario and Sonic is easily the most significant third party title for Nintendo in years.