This is a PSGI application that connects to Twitter streaming API and displays the recent 10 tweets received from the firehose.
Twitter API apps are the new "Hello world." Fun and sexy, but not useful. Here's a sample PSGI app that consumes the twitter streaming API (which is much more complicated to consume than most other API examples). Many start-ups today do nothing but consume & repackage these feeds, and Tatsuhiko just gave it away for free.