For the past couple of years, many SF'ers have added Santa hats to their Gravatars For Christmas. Feel free to join in, here are the hats we've used in the past:
Since Wesley hasn't bothered to make me a better one yet I'm still using my hackjob from Two Years Ago.
UPDATE: I (wesley) had a little trouble covering up the pre-existing hat, but think I did okay:
Update Deux: I don't want to discuss how I acquired the source image. Ever.
Update Trois: This is less insane and facing the correct direction.
@pauska is probably more closely related to Krampus than Kris Kringle, but hey...