USCCB: United States Conference of Catholic Bishops
This is a comprehensive site on the changes in the new Roman Missal. It includes the actual texts of the People's Prayers and the Priest's Prayers and many articles and resources for exploring the topic of the new Roman Missal http://old.usccb.org/romanmissal/index.shtml
Archdiocese of Boston's website:
The archdiocesan website has a section devoted to the new Roman Missal. It also links to several of the other sites listed on this page. http://www.bostoncatholic.org/newromanmissal.aspx
Revisedromanmissal.org
This site is sponosred by Litugical Traning Publications. It has many free informational articles and resouces, as well as publications for sale. http://revisedromanmissal.org/Resources.aspx
Loyola Press Webinar presentations
Three separate audio presentations with slides, each 15-20 minutes in length, explaining the changes in the Roman Missal. Presented by Joe Paprocki. (Very well done!) http://www.loyolapress.com/roman-missal-changes-webinar.htm