What is the basis for Christian disapproval of creation of artificial life?

We can now design bacterial genome from scratch, as mentioned in this thread on skeptics.se, and this opens up new and exciting possibilities for solving many problems the humanity is facing today, from efficient generation of drugs and fuels to pollution and world hunger (although the latter might require more advances before a feasible solution can be engineered). Naturally, most secular thinkers hail this as a dawn of new era for humanity with less suffering and more prosperity for everyone. Religious figures, on the other hand, almost universally condemn this advance. Why? What is the basis on which Christians dislike the idea of artificially created life forms? I understand that different branches may have different explanations. Since I'm don't know much of the difference between them, it's OK if in your answers you will concentrate on any one of your choice.