yes, very few. but kids don't care, they're kids!? why should kids care about social issues & why should disney teach them their friends can be gay when their parents can do it for free?
i can see a teen sitcom on disney channel with a gay person but a movie wouldn't make any (or little) profit & hurt disney's image.
Why should a gay prince hurt Disney's image? You can portray homosexuality without making it overtly sexual.