Four short links: 24 June 2009

The Digital Open -- The Digital Open is an online technology community and competition for youth around the world, age 17 and under. Building a community of young open source hackers. Four Crowdsoucing Lessons from the Guardian's Spectacular Expenses Scandal Experiment -- Your workers are unpaid, so make it fun. How to lure them? By making it feel like... http://ping.fm/zj3Lt