The #TwitterMetrics project is about finding stories in everyday data. It takes data from the Twitter and elsewhere and displays it in interesting ways. You can find out more about how the infographics are created by clicking on them and you can follow the project on Twitter (naturally :).
#TwitterSentiment scans Twitter every 15 minutes for trending terms and measures their sentiment using lists of positive and negative words. You can read about the project here.
The Happiness Heat Map attempts to find the happiest place on earth by searching Twitter for the ‘smiley face emoticon’ – :) – and creating a heatmap of where the returned tweets were made. Once the happiest place in the world emerges, I may move there.