The Catholic world seems to be full of interesting stuff today - like Cardinal Keeler's piece on CatholicExchange:

The very scenarios often cited as justifications for human cloning are actually symptoms of the moral problem it creates. It has been said that cloning could be used to create “copies” of illustrious people, or to replace a deceased loved one, or even to provide a source of spare tissues or organs for the person whose genetic material was used for the procedure. In each proposal we see a utilitarian view of human life, in which a human being is treated as a means to someone else's ends instead of as a person with his or her own inherent dignity. This same attitude lies at the root of human slavery.