jQuery & JavaScript: Christmas effects

Christmas is coming and you might want to put some effects on your web page.
I have thought a lot about saying this or not, but I couldn't pass over in silence: I really hate those kind of things, but I know that some of you might be interested anyway.
If so, please look into this short list of possible JavaScript and jQuery solutions.

Flashing lights

JavaScript Christmas Countdown digital clock

Google's Christmas Doodle

Snow Effect

Snowstorm

30/11/2011 Update: Following a kind  comment from Jason, I decided to add his jQuery plugin page:
jQuery Snowfall