I have been sampling online Christmas music streams and I have a couple to recommend for those of you who, like me, sit at a computer most the day.
This one is out of the Netherlands. You'll need to click on the orange link that says "Open de online RTL FM player". It plays pretty much the same music you'd hear on your average American Christmas station, but the commercials are in Dutch and therefore a lot less annoying.
This one is out of France. It plays the songs you're used to as well as music you probably wouldn't hear on your average American Christmas station - international Christmas carols in a variety of languages. Also, it will keep things interesting by throwing in random selections such as a song I just heard that was on The Muppet Christmas Carol.
And just as a side note, some interesting pictures come up when you search google images for pictures of Christmas carolers. Like this one. And this one. Oh, and this one. I chose the picture that looked like it was made on a Lite Brite.