The extended version of "It's a Pony Kind of Christmas" has officially released as of yesterday. This is the one that includes both the originals from back in December, as well as all the songs from "A Hearth's Warming Tail". One of the best parts about this is the complete version of Luna's Future, which cuts Starlight's vocals to show just the glorious moonmare in all her singing glory in much higher quality.
I'm still listening through it, but so far it's so much better than the terrible Youtube rips.
Go get it over on Amazon!
Thanks to MLPBronyPony and Feather Data for the heads up!