The “Netduino+ Tweeting Geiger Counter” is a great example of the type of project you can enter for the Adafruit + Instructables Make It Tweet Challenge…

Adafruit + Instructables Make It Tweet Challenge We’re teaming up with Instructables to bring you the Make It Tweet Challenge. Ever wish you had a tweeting coffee pot that would announce via Twitter when a pot was ready? What about a potted plant that twittered when it needed to be watered? This is your chance to make it tweet! How can you win the Adafruit Make It Tweet Challenge? Submit a Photo, Step-by-Step or Video Instructable explaining how you made an object tweet. Create awesome photos, good documentation and clear steps for how your project works. Your creativity and ingenuity may rewarded by winning awesome prizes!