We had a party this past weekend and served these. Though it's really more a mixed drink than a true martini, the ladies in attendance were quite happy with them. I made a pitcher's worth in the afternoon and then put it in the refrigerator to chill. When it was time to serve, I would pour some into a shaker with ice and then shake to chill even more before pouring into a martini glass:
(Makes 12 servings)
12 oz. Vodka
6 oz Triplesec
9 cups Pomegranate Juice
Oprah's original version can be found here.