In a large bowl combine strawberry halves, balled cantaloupes and honey dew melon. Add white sugar and lime juice and toss. Blend well, cover and leave on counter, at room temperature for 1/2 hour. Refridgerate until ready to serve.
In a small bowl mix yogurt, whipping cream and white sugar, orange juice, orange rind, and the finely chopped dates. Blend well and taste. Adjust sugar and orange juice if necessary and chill for 3 hours.
Serve in individual dishes, pour the dip over the top of fruit salad, sprinkle with pistachio nuts and enjoy.