As you know, Erin Morgenstern's debut novel, The Night Circus, was one of my favorite books from 2011, and is one of the books that I think will be added to my permanent lists of favorites. If you haven't already read it, it's one I highly recommend.
Morgenstern posts a series of flash fiction on her blog, collected under the name "Flax-Golden Tales." One of her recent entries, "Princesses," is my favorite so far.