They will return: mankind will learnNow that's a far cry from the "Fear not!" in the Christmas story.
New kinds of fear when they are here.
Cthulhu is one of the Old Ones and seems to be more active in the world now than when I was young. I see signs of this activity off and on. For example, Cthulhu had a presidential campaign again this year, though I was busy supporting Obama and didn't track it this time around. Cthulhu has supporters among the humans, and they are adapting some Christian evangelism materials in their quest to show others what lies ahead. You can be eaten first. Read the tract here or here or here to find out how. Cthulhu even has a page at How Stuff Works giving historical information and helpful hints on how to pronounce the name. You can read about Cthulhu in the works of H.P. Lovecraft. Try The Call of Cthulhu, which can be read online here.
The H.P. Lovecraft Society has a site where you can buy CDs of holiday music that's a bit out of the ordinary.