Summorum Pontificam!
This is the motu proprio for the Mass of 1962. It was published this morning on the Vatican Website.
http://212.77.1.245/news_services/press/vis/dinamiche/indd_e n.htm#start
Both the document and the accompanying letter are there.
Be aware of the fact that the USCCB’s “translation” doesn’t match the Vatican text. They apparently are playing their childish games already!