1. Reserve a few flakes of crabmeat for garnish; refrigerate until ready to serve.
2. Stir together mayonnaise or salad dressing, sour cream, the remaining flaked crabmeat, dill weed, onion, lime peel, lime juice, hot pepper sauce, and, if desired, ground red pepper; mix well. Transfer to serving bowl, and refrigerate for 2 hours or overnight.
3. Just before serving, sprinkle dip with reserved crabmeat. If desired, garnish with fresh dill sprig. Serve with fresh vegetable dippers. Makes about 1-1/2 cups dip (twelve 2-tablespoon servings).