Starting right now and continuing until tomorrow, wings will be available for purchase in the Runes of Magic item shop. While it doesn't look like the wings do anything other than look really cool on your character, this is a very limited time item. Because of the limited window of purchase, these wings will most likely become a coveted item very quickly. (As long as they're not offered again later, of course.)
If you're interested in grabbing a pair of these feathery wonders, you'll have to do it from inside the game's cash shop menu, under the "special offers" section of the store.