Cook pasta according to package directions; drain and cool.
In a large bowl, pour boiling water over raisins. Let stand for 5 minutes. Drain thoroughly.
Add grapes, peaches or nectarines, celery, walnuts, and cooled pasta to drained raisins.
For dressing, in a medium bowl, combine cream cheese, yogurt, honey, lemon peel, and lemon juice. Beat with an electric mixer on medium speed until nearly smooth and well mixed. Stir in whipping cream.
Pour dressing over pasta mixture; stir to coat. Cover and chill for 2 to 6 hours. If necessary, stir in a little milk to moisten the salad before serving. Makes 8 side-dish servings.