Idle Prose, Editor on the Sword Coast, wrote a story! · 7:39pm Sep 28th, 2013
And posted it to Fimfiction: Changelings Change Everything
It's got Luna. Erbdy loves Luna. And Luna, in this fic, is awesome and owns some Changelings.
Celestia also does some stuff later on if that's your thing, but that's not posted yet.
Go read it!