Heat charcoal or gas grill to medium-high. Slice each hot dog into four pieces; set aside. Slice onions in half crosswise. Cut zucchini into 3/4-inch pieces. Thread hot dogs, onions, zucchini and cherry tomatoes onto 12-inch skewers.
In small mixing bowl, combine honey, pineapple juice and mustard; brush hot dogs and vegetables with sauce. (Kabobs may be marinated in the sauce, refrigerated up to 24 hours, if desired.
Cook on medium-hot grill for 8 to 15 minutes; turn once during cooking and brush with sauce every 2 to 3 minutes.