Check out Indiali.com (on Facebook as an app here), the latest Facebook application powered by NewsCloud's free, open source software. The Indiali news community began as a Facebook page and has grown to have 3.3 million fans. Indiali's using NewsCloud to improve the quality of community features that they can offer.
NewsCloud's free open source Facebook software is funded by the John S. and James L. Knight Foundation through April 2012. NewsCloud can be installed easily in minutes and hosted for less than $45 per month.