I, too, googled Festivus and the sites I went to made me laugh. I'm one of those people who get depressed around Christmas and some years the idea of dragging out all the decorations and putting up a tree fill me with dread. The idea of a plain pole sounds wonderfully silly and fun.
One of the sites said Festivus was for those who didn't identify with Christianity, Judaism, or Wicca. While I consider myself a Christian with Paganistic leanings (yeah, I know I'm confused) sometimes I just want to chuck everything and start over. Maybe, Festivus is the way to go. More research is needed.