Julie,
I was recently wondering the very same thing. I remember several years back when they did the first hand transplant in France. It was a huge ethical issue because the side effects of the anti-rejection drugs. Since missing a hand was not life threatening, many considered it to be immoral to put this man's life at risk, just so he could have a limited use hand.
I clearly remember at that time, they said that better anti-rejection drugs were coming down the pike which would have much less side effects and make such transplants more common, because the risk would be so much less. Then a few years later we heard about the scalp transplant and now the face transplant.
Certainly as the drugs get better and the risk becomes less, someone will attempt this. The demand would be huge, and the moral implications huge. I could see parents wanting to have thier deceased daughters reproductive tract transplanted to someone else, in order for thier daughter to have children, even after death. Same thing with males. Even with narrower hips, transplanted uterus' could still undergo ceasarian section delivery, so this would really not be an issue. Like I said though, the moral implications are tremendous.
I figure it's only a matter of time. History has taught us that if it can happen, it will. I can tell you, I would sign up for it in an instant.
Love always,
Elizabeth