If I remember correctly, Chiroptera did something rather like this at some point. I had a brief dig through his history but couldn't find it though... I think he's your man though.
Yes! That's what I was thinking of. Thanks for digging that up, Modulous.
Although it isn't explicitly written in a question and answer format I think it offers a very neat slippery slope to evolution. Of course, its not one that everyone will have a stomach for...