http://www.codenamerevolution.com/?p=4947

Entire post is quoted directly from them. 

The following list consists of confirmed third-party developers on board for the Wii. The list does not include developers that are subsidiaries of companies like Helixe which is now a THQ company.

It is important to note that many developers have not confirmed support as yet, but has taken strong interest in Wii development. Second-party developers are not part of this list. It is likely that some developers are missing on this list.

Note: According to Nintendo, 500 studios have received a Wii kit by far.

Total Known Third-Party Count = 131

10Tacle Studios
A2M
Activision
Amaze Entertainment
AGFRAG
Alten8
AQ Interactive
ASNetworks
Arc Systems
Artdink
Atari
Atlus
Backbone Entertainment
BANPRESTO
Barking Lizards
Big Blue Bubble
Blitz Games
Buena Vista Games
Capcom
Cellien Studios
Cing
Codemasters
Compile Heart
Conspiracy Entertainment
Coresoft
Crossbeam Studios
D2C Games
D3Publisher
Data Design Interactive
Day 1
Detn8 Games
Digital Embyro
EDEN Games
Edge of Reality
eGames
Eidos
Electronic Arts
Eko
Emerging Entertainment
EPOCH
Epyx
From Yellow to Orange
From Software
Gas Powered Games
Gearbox Software
Genki
Gorilla Systems Corporation
Graffiti Entertainment
Grand Prix Games
Grasshopper
High Voltage
Hudson
Ignition Entertainment
Image Epoch
Interactive Brains
Interchannel-Holon
IR Gurus
JALECO
Jet Black Games
JoWood
Keen Games
Koei
Konami / Kojima Studios
Krome Studios
Left Field Productions
Lucasarts
Majesco
Marvelous Interactive / Natsume
Mastiff
Matsuno - Unknown Studio Name
Media Vision
Midway Games
Milestone
MTO
Namco Bandai
Nippon Ichi
Nissimo
Neko Entertainment
NIBRIS
oeFun, Inc
Page 44
Pandemic Studios
Papaya Studios
Pipeworks Software
Planet Moon Studios
Playlogic
Powerhead Games
Pronto Games
Pyro Studios
Quotix Software
Radical Entertainment
Raven Software
Red Tribe
Route24
SEGA
Sensory Sweep
Shiny Entertainment
Smart Bomb Interactive
SNK
Spike
Square Enix
Starfish SD
Stormfront Studios
Success
System 3
Taito
Take-Two / Rockstar Games
Tantalus
Tecmo
Telltale Games
Terminal Reality
The Adventure Company
The Game Factor
The Mitchell Corporation
THQ
TOMY
Torus
Totally Games
Townfactory
Tuna Technologies
Twelve Interactive
Ubisoft
Vicious Cycle
Viracious Visions
Virtual Toys
Vivendi Universal Games, Sierra Online
Warner Bros. Interactive
Wayforward
Wideload Games
Yukes
Zoonami

Note: Three or four companies have not confirmed a Publisher. In addition to third-party development for the Wii, eight other companies that are not listed have confirmed development for the Virtual Console/Downloadable Games Service. They are: Chunsoft, D4 Enterprise, Irem, NCS Masaya, Netfarm, Paon, Rocket Company and Sunsoft.

And how many of them will actually release groundbreaking epic games? If you're lucky 1 or 2. All the good stuff is being saved for the PS3 and 360.

Engeland is talkin bullshit crap...

Why is Suda51 not on the list...?!

And where is Monolith?!

 Sorry, but claiming that is so doesn't make it so. Plus you clearly are delusional if you think ground-breaking, epic games are all "being saved" for any system at all. Epic games are fairly common, but ground-breaking ones? Those come along about once a year on average. Those are games like GTA III (not the sequels, since those refined what was already there), Super Mario 64, or Metal Gear Solid 1.

 So far the 7th gen hasn't had any. There have been epic games (Gears, Resistance, Twilight Princess), but nothing actually ground-breaking.

 And besides, it's nearly impossible to reserve a ground-breaking game for one system. You don't know the game is ground breaking until its standards start being assimilated. So your comment is a total lie.

And Rockstar... (For you who don't know yet: Manhunt 2 is on coming for Wii so they should be on the list!)

The PS3/360's greats so far look more to be evolutionary games moreso than revolutionary. Not to say they aren't impressive. 

Btw, Monolith is now considered "Second Party", and not 1st or 3rd party.

Damn no Firaxis I had some hope for a SMAC port