Cynthia,
Thank you for the neat idea. Martha Stewart always has the best ideas! She is a wonderful inspiration to us all. She uses pomegranates but you also suggest using citrus fruit and even apples and peaches. I guess oranges, grapefruits and even pears would work as well. They are a healthy treat for the guests and make a nice placecard and a nice favor. Of course, you can also include another favor as well but you do not have to.