Place first 4 ingredients in a large bowl. Combine juice concentrate, rum, honey, curry, and ginger; stir well. Pour juice mixture over fruit, and toss gently. Cover and chill 3 hours, stirring occasionally.
Soak 12 (6-inch) wooden skewers in water for 30 minutes. Drain fruit mixture, reserving 2 tablespoons juice. Thread fruit alternately onto skewers. Place kabobs on a baking sheet coated with cooking spray. Broil 3 inches from heat (with electric oven door partially opened) 3 to 4 minutes on each side or until fruit is lightly browned.
Combine 2 tablespoons reserved juice mixture and yogurt; stir well. Serve kabobs with yogurt sauce.