1. To make crab cakes, combine crabmeat, 1 cup breadcrumbs, mayonnaise, 2 tablespoons chives, juice, egg whites, salt, and red and black peppers. Mix well and shape to form 8 (1/2-inch-thick) patties. (Patties may be covered with plastic and refrigerated up to 4 hours before cooking.)
2. To make corn salsa, cut corn kernels from cobs; transfer the kernels and any milky juices to a small bowl. Add tomatoes, 1 tablespoon chives, and dressing; mix well.
3. Heat oil in a 12-inch nonstick skillet over medium heat until hot. Dip crab cakes lightly in 1/2 cup breadcrumbs. Add crab cakes to hot skillet; cook 5 minutes per side or until golden. Transfer to plates; top with corn salsa.