A new species has evolved
I just read a great little article on the documentation of a new type of lizard which has evolved on a little island in the adriatic. Long story short: About 37 years ago, some scientists transplanted a group of these lizards from one island to another; the latter being climatologically similar, but having different enough environmental factors to exert different selection pressures on the little immigrants.
Over the course of just under four decades, they managed to mutate some brand new organs in their stomach, and their behavior, diets, and bone structures have changed in some very noticable ways. I'm not sure if they're still capable of breeding with the parent population on their original island or not - the article doesn't go into that - but I wouldn't be shocked if they could... for now. It's very possible that in time they'll become too distinct.
As to how this has happened so quickly, the best I can offer at this moment in time is that this is basically how spieciation happens in an optimal situation; ten lizards (five female, five male) were placed alone on this island where their old physical structures were no longer ideal, but not instantly deadly. Such a low breeding population and frequent inbreeding is optimal for rapid mutation and change. This sort of thing often turns out to be disastrous, producing birth defects and such which dooms the population, but every so often, as in this case, the mutations hit a winning streak, so to speak, and produce novel new organs and structures which help the population to thrive.
The whole article can be read here with some additional material and commentary here.
So, bookmark this story. Next time a christian creationist tells you that mutations never produce new information, that mutations are always harmful, or that we've never seen a new spiecies evolve, you have your ready refutation.