I know that sounds (and spells) a little weird but that's what the press release says. A "Footii Party". Whatever, just so long as there are no creepy toe fetishists involved I'll go along with it.
Apparently this party is one of the new features - along with "Table Soccer" and "Shoot Off" - of FIFA 08 that will be a Wii exclusive. The game will also includes the ability for you to play as a self-created "Mii" character and unlock the chance to play the game's cover star Ronaldinho for world footballing supremacy or something.
Personally I'm not a Wii fan; the motion-based controllers require you to jump around the living like a some fat dancer rejected from the last Justin Timberlake tour and that makes me feel like a jackass. I will stick to the PS2, PSP and Xbox 360 versions of the game.
You can get more info from the press release here.