E3 2007 will happen in July and here is the list of the entire (some not yet announced) participant and the games they said will be introduce and demonstrate:

http://au.games.ign.com/articles/793/793082p1.html

I did the calculations and I will try and keep it up to date as the developers pour in more of the coming games:

Sony Computer E             21 games

Capcom                            15

EA                                     14

Natsume                           10

Majesco                             7

Sierra                                 7

Akella                                 6

Gamecock                           6

D3                                       6

Sony Online E                      6

Codemaster                         5

Crave                                   5

Lucas                                   4

Midway                                4

NCSoft                                 4

Warner Bros.                       4

2K sport                               3

Atari                                     3

Disney                                  3

Eidos                                    2

GSC                                      2

Bethesda                              1

Foundation 9                        1

Id Software                          1

Total number of games                 140 (till now)

Games based on consoles (some games are multi-platform and thus appears on everyone separately):

PS3                                         51 games

X360                                       40

PC                                           35

DS                                           33

PSP                                          22

PS2                                          20

Wii                                           17

(There is always a margin of error)

the Wii has less games than the PS2, PSP, and DS?- that's really crazy
Either everyone is holding back Wii announcements or Nintendo still has third party support trouble.

Nintendo hasn't announced what they're showing at E3 yet, they probably won't 'till they get there.

 Nintendo's the biggest Wii game developer (duh), and they don't talk until the show...they can afford to keep secrets.

And thats what we know.

iam sure the big 3 will try to upstage each other with big secret announcments.

I know that but even counting in Nintendo, would that bring Wii games to 360, PS3 level? I just don't know but when you look at the list-third party support is 360/PS3 oriented for obviously reasons.

Also, I like the fact that Nintendo keeps everything a secret and then surprises the hell out of everybody

Doesn't seem to be any real surprises yet, hopefully there are some games that get listed that we haven't heard about already.

when blue3 said big three, i think he meant Sony, Microsoft, and Nintendo.

Are you talking about MP3, SSBB, and SMG for Nintendo?

True, I think either Nintendo and third parties will have some announcements.
I expect about 5-6 Wii games from Namco, 2 more from Konami, and 1 new from Square ( maybe).
Wii will probably get close to both 360 and PS3 when everyone reveals their projects, but I won´t catch them because of the multiplatform game of 360-PS3, that are a lot.

What games do you think will be shown?