You realize that this is wonderful evidence for creation, not evolution! I'm new to this forum, in fact, this is the first post I have ever made to any discussion board. I say that since I don't know to what extent terms have been defined.
The term "Evolution" or "Micro-evolution" is commonly used in some evolutionist circles to simply refer to "Adaptation" or "Natural Selection" which has nothing at all to do with molecules to man Evolution. This discovery, which has long been postulated by creationists, is an example of natural selection which was first proposed before Darwin by creationists. In fact we can attribute the foundations of the majority of modern science to creationists.
You cannot take the fact that finches have adapted to their environment by developing longer or shorter beaks and then extrapolate that to say they will turn in alligators if we wait long enough! After millions of generations, birds are still birds, bacteria are still bacteria and so on. Organisms adapt within their "kind" but do not become different organisms. This requires the addition of new genetic information, not simply the shuffling or loss of genetic information. Some of the finches in this study were not able to adapt and have suffered probably because they have lost the genetic information to do so.
Natural selection is an essential fact necessary for the theory of creationism and this study demonstrates that it doesn't take millions of years for species to change and adapt within their kind. This makes possible the diversity of life we see today to develop from the intial created kinds in only a few thousand, not millions, of years.