I just looked it up in the Wishbook. Here are the details:
$75/person for lunch
$100/person for dinner
Minimum food and beverage expense before service charges, tax and tips for events ending prior to 5:00pm is $1,000 (NAPA room) $1,000 (SONOMA room.)
Minimum food and beverage expense before service charges, tax and tips for events ending after 5:00pm is $3,000 (NAPA room) $2,000 (SONOMA room.)
Seats up to 50 guests (NAPA room) or 30 guests (SONOMA room)
Use of entertainment and dance floor will decrease capacity
Menu is based on existing California Grill menu
View is of the Magic Kingdom (NAPA room) or Bay Lake (SONOMA room)