I cannot say that I know so much about the Rugby World Cup 2011 but they just released a slick app for both the BlackBerry PlayBook and select BlackBerry smartphones. The app includes BBM 6 integration for the smartphone app to share content, status, and even live match in-app chat. You also get access to live match coverage, real time live commentary, stats, and video highlights. The app is available in English, French, and Spanish though an odd assortment of smartphones are supported.
Check out the free Rugby World Cup 2011 app in App World