Good, someone providing some valid examples.
Thanks for the link, that's very informative.
But like the article says, those are an example of losing traits and information, not gaining.
Also, I really don't see the advantage of being blind. Granted, seeing in dark places isn't an advantage either, the point is that the fish doesn't gain an advantage. In the case of the beetle, he loses wings that he already had, he doesn't gain anything productive. This is an example of deterioration, not evolution.