On October 27th, 2009, Arlton Lowry gave a presentation at the Refresh Central Arkansas gathering on Elgg, an open-source social networking and social publishing platform. If you are not familiar w/ Elgg, here’s a little information from their website:
Elgg, started in 2004, is an open source social engine which powers all kinds of social environments – from education to business and sports such as rugby. If you are looking to create your own social application or want to build and run a site for your organisation, Elgg is a great choice as it provides the building blocks you will need.

Presenting Elgg at Refresh Central Arkansas