ThingSpeak is an open source application platform that helps you take a physical device (like, say an Arduino) and quickly and easily link to to a network (like, say Twitter) so you can share your information across the globe. It's a great resource if you're looking for an easy way to get the info from things like sensors, GPS chips, etc. to people in a meaningful way.
So to celebrate their 300th ThingSpeak channel, they have announced a new contest which they call "The Easiest Contest Ever." The rules are pretty straightforward: build a project using a ThingSpeak web service, take a picture of it, do a write-up, and email them the details. The winners will get one of twenty $50 SparkFun gift certificates.
So what will you build? Will it be a Tweeting Kegerator? Or a light-switch that lets you know when you've accidentally left it on? Get creative - we can't wait to see what you come up with. Good luck!