Gerald Augustinus over at The Cafeteria Is Closed has a wonderful essay on the upcoming Motu Proprio on what the Vatican has been calling the Mass of John XXIII, that is the Mass as celebrated according to the 1962 Missal.
For those who have stumbled to this site from outside the St. Blogosphere, the Holy Father is preparing to "liberate" the old rite, that is allow it to be more widely celebrated alongside the new rite, which was the fruits of the post Vatican II liturgical reform.
Tomorrow is the day the MP will be released to the public. A number of bishops have already seen it. So if Catholic sites seem to load a little slower tomorrow, especially the Vatican site, now you know why.