For those who are interested in additional information about devotion to Mary from a Montfortian perspective, these links may be beneficial.
http://www.montfort.org.uk/links.htm provides a menu of references
http://www.montfort.org.uk/Writings/MontWork.html provides free online study of books by St. Lous Marie de Montfort
http://www.montfort.org.uk/footsteps/archive/9-1-Spring2004/td160.htm provides a different link to the Commentary on the Letter by Pope John Paul II and the letter itself that was posted earlier today.
http://www.montfort.org.uk/footsteps/archive/9-1-Spring2004/woman-cross.htm has a reflection on the Pope's letter, "The Woman at the Cross," by Fr. Mitchell, S.M.M.