"Snow" appears on the "December" EP from Sleeping At Last, part of their yearbook project in which they release a new EP every month. You can get "December" through Amazon MP3 or iTunes, or just get a subscription for the whole set at the Sleeping At Last web store. And don't forget to pick up the band's Christmas Collection (no "Snow" on that)--available as a free download for a limited time only.
I love Christmas, music, and cats. What more do you need to know?