1. Pour couscous into a large bowl, and stir in 1 cup boiling water. Cover with plastic wrap, and let steam 5 minutes or until couscous is tender. Fluff with a fork, and stir in oil and next 3 ingredients. Let cool slightly.
2. Zest both oranges; juice one. Peel second orange, and chop. Add zest, juice, and chopped orange to couscous mixture. Stir in remaining ingredients. Cover and chill 1 hour or up to 2 days. Add more oil, salt, or pepper if desired before serving.