Happy Bay to all (especially tom and Pierre)
Here are some logos

Google:
http://www.google.fr/logos/bastilleday07.gif

Yahoo:
Has none on french site http://yahoo.fr but a weird unrelated logo on http://yahoo.com

Ask:
Has none, only a link about Tour De France

Exalead:
Strangely has nothing.

So it seems only google made a logo.

http://www.google.fr/logos/bastilleday06.gif
http://www.google.fr/logos/bastilleday05.gif
http://www.google.fr/logos/bastilleday04.gif
http://www.google.fr/logos/bastilleday03.gif
http://www.google.fr/logos/bastilleday02.gif
http://www.google.fr/logos/bastilleday.gif

<< Exalead:
Strangely has nothing. >>

Huh?
What's that? :/

BTW, the logo on yahoo.com is pretty stupid!

(But after all, it's Yahoo! . So i'm not expecting something.. :P)

<<<< Exalead:
Strangely has nothing. >>

Huh?
What's that? :/>>
A european search engine part of the Quaero Project; Europe's Google Killer

(and its based in france)

Theyt have actually now put up a logo on exalead:
http://www.exalead.fr/apogee/en/logo-fr-14juillet-2007.gif

[ Link fixed – David]

Thank you guys, I didn't even think to look for other Bastille Day logos ;)