Stack Exchange last year did an end of the year party featuring special hats. They want to know if we want to do the same thing this year to our site. So, do we want hats?
I believe it should be fun enough, and if someone wouldn't want any of such harmless, fun kitsch and still display our plain, vanilla Stack Exchange beta design even during the festive season, then they will have an option to opt-out in settings. From mod message:
Individual users who don’t want to participate, don’t want to see hats, and/or are generally anti-hat will have an “I hate hats” option available. And just like last time, at the end of the event, all hats will go back into storage.
Space Exploration is also available through a web address thefinalfrontier.stackexchange.com. It just redirects to the usual address, substituting "thefinalfrontier" with "space", so any URL on the main site should work (including your profile, questions etc.). Might be fun posting it on other sites, especially in December. :D