Check out Twitter API: Up and Running: http://oreilly.com/catalog/9780596154622 http://oreilly.com/catalog/9780596154622 Chapter 1 has a great section called "

Check out Twitter API: Up and Running: http://oreilly.com/catalog/9780596154622 http://oreilly.com/catalog/9780596154622 Chapter 1 has a great section called "Creative Uses of Twitter" (& a history of Twitter). Examples range from breaking news & games like Artwiculate to organizing protests & flash mobs. Also, Twitter is adding geotagging [http://www.guardian.co.uk/media/pda/2009/aug/21/twitter-google http://www.guardian.co.uk/media/pda/2009/aug/21/twitter-goog...], so you'll soon be able to get feeds for, say, restaurant deals in your area...