In a large bowl, toss together both kinds of cabbage, shrimp, corn, pepper, red onion and cilantro.
In small bowl, whisk together vinegar, oil, lime juice, sugar and cumin; stir to blend. Add dressing to salad; mix gently. Add jalapeno, salt and pepper.
Line 8 glasses or bowls with tortilla chips to cover bottoms. Spoon slaw on top. Garnish with cilantro and/or avocado.