Earlier I posted on the competition Scott McLeod at Dangerously Irrelevant has going on for egregious Establishment Clause violations. Well, now I am imploring you to go over and read/participate in the raging Christmas and Establishment Clause debate taking place there. There are scholars and practitioners on all sides and it has gotten serious enough that we are starting to cite sources. There are already 50 comments on his post, so feel free to join in the "holiday" conversation.
Update: I have now been called a dolt and have been portrayed as a dancing elf. I told you this was a good conversation.