Instructables member Gelotology calls it the Tweetball. It’s a custom-made Christmas tree ornament that displays a stream of tweets from a certain username, hashtag or keyword. I could have used this last Christmas because sometimes a whole hour might go by and I wouldn’t be able to check out my Twitter stream.
Gelotology made it with an Arduino controller and two PHP scripts. You can find his step-by-step instructions here.
-via Hack A Day