I am a Sunken Treasure devotee and got this recipe from these boards.
There is an earlier version, but this is the one they serve @ WDW now:
1 oz Malibu cocoanut Rum
1 oz Midori
orange juice
pineapple juice
.05 oz Curacao
Splash of Sprite
Pour Midori & Malibu rum into ice filled glass, fill rest of glass with equal parts of orange juice and pineapple juice. Shake.
Top with Sprite & float of Curacao.
Since I like mine straight up, I put the ingredients, up to the 'shake' point into a cocktail shaker filled with ice, shake, strain & pour into my highball glass, then top off with the Sprite & Curacao float.
Enjoy!
Jean