Compliments of The Curt Jester:
A few links to some "favorite" carols, then a really cool invention: the Latin lyric to Rudolph the Red-Nosed Reindeer, and even a link to the file of a choir singing it, accompanied by a pipe organ (probably built to theatre specs, but a pipe organ just the same).
Also in the story is a link to a really bad rendition of O Holy Night. I thought being tortured by the Christina Aguilera version was bad, until hearing this. This is from Victor Lams' Free Albums Galore.