In a small bowl, combine the fish sauce, lime juice, salt, and sugar. Set aside.
Soak the glass noodles in water for 10 minutes. Place noodles and water in a saucepan and bring to a boil. Cook for 1 minute, then drain noodles and rinse under cold running water to take the heat off.
Place the noodles, shrimp, squid and the remaining salad ingredients in a large bowl. Pour the dressing over the salad and toss lightly to coat.
Arrange the salad over lettuce leaves. Sprinkle with the roasted ground peanuts and serve with lime wedges.