So, what have you got in store for Advent? 
I plan to post the Missa Ancilla Domini of Fr. Dufay which was sung for Advent and the feast of the Annunciation. I am thinking of posting versions of the Alma Redemptoris Mater, his and Ockeghem's versions, and other versions. There are some Gregorian chants I think of to post too. Perhaps there are some polyphonic renditions I can find as well. Oh, yes, and of course, I will be posting videos with the theme of Our Lady of Guadalupe.