XBian is a free, Open Source media center distribution for mini computers (currently Raspberry Pi, Solidrun's Cubox/Hummingboard supported). It can be downloaded at http://www.xbian.org. Our slogan is "bleeding edge" as our main focus is delivering the fastest media center solution. We believe that everyone can help make XBian better. Please visit our website for support and if you have suggestions, wishes or contributions, please share them with us!
Our development wiki (containing various instructions) can be found here