From Social Patterns
Being open is all the rage these days, but it means many things to many people. It can mean radical transparency, the use of open-source software, exposing platform hooks, crowdsourcing, and more.
To get started, ask yourself, "how could this interface be improved if we made it more open?" while designing your experiences.
Then see Open for Business for several approaches to openness that we believe are essential to the effective design and development of social environments online.