I have to agree with Reggie. 3rd party developers don't get the Wii. They are used to producing games that one person plays, alone, for hours at a time. Excluding the Nintendofanboys, people buy the Wii to play fun, easy games for short burst with others.
That's why MarioKart is such a beast.
However people are not as stupid as 3rd parties would like to believe. Yeah you put a crap party game out you'll get a few buyers but not the 10m MarioKart sees. That takes producing a quality game with addictive gameplay and making it gender and age neutral.

Boom Blox gets it, has sold decently (very decently considering the price IMO) and is getting a sequel.

Shawn White Snowboarding gets it. I'm sure it'll sell well.

CoDWaW clearly doesn't. It's the wrong design philosphy for Wii. They put a real effort into it but it's a poorman's version of the HD/PC game. They should have made it more distinctive, with multiplayer splitscreen (and splitscreen online) more stylized, less 'realistic' (cause let's face it if you're going for realism you want HD) but just as good. Basically a version that's CoD but distinctive enough that people would want to get BOTH the HD and Wii versions.

De Blob also doesn't get it. Clearly doesn't in fact. Great game, very polished but cannot be played for short periods of time. You have to finish an entire level before you can save which takes way too long. Most Wii gamers don't want to dedicate 1-2 hours to a game (at one time). Multiplayer is fine but not the focus here.

Oddly Wii Music also fails to get it entirely. Miyamoto focused too much on making a real music game, one where you actually play with music not just following a beat. But most people are not very musically inclined. Some will LOVE the game but for many it's just a noise maker since they can't really play music. Guitar Hero is definately a Wii game. Anyone can play and enjoy it. So even Nintendo struggles with this new audience.

In a way the Wii has taken us back to the Atari 2600 days where anyone could pick up the controller and figure out the game in seconds and have a blast. Now I am not saying we need 8 bit games, but Wii needs games that have that Pac-Man appeal again. Just plain (addictive) fun for everyone with no commitment to the game required but where commitment is rewarded.