I built a tiny device for displaying Twitter updates on my table-top.
http://www.paramaggarwal.com/post/28330849923/scrolling-tweets-a-tiny-display-for-the-latest-newsA scrolling text display that shows me the latest tweets from the @verge account.
Completely wireless via WiFi and uses a Heroku backend to get the tweets from the Twitter API. Built on the Arduino platform.
Check the full code and video on the link.