The Econe Four have had their sentences of Excommunication lifted, the dreadful punishment was imposed on them for taking part in ordinations without the Mandate of the Holy See. In the Middle Ages at its very worse it was seen an application of "the Keys" loosing one from the Communion of the Church on earth and heaven, in this life and the next, we are bit more liberal nowadays, we tend to regard Excommunication as remedial and ending with death, hence no mention of Archbishop Lefebrve and Bishop Castro de Mayer.
There are is still along way to go, the Sacraments of Marriage and Penance celebrated by the priests of the Society, who are still suspended, are still invalid, for example. Fortunately this seems to be the beginning of the end. I look forward to a meeting of the diocesan clergy in which there will be priests of the two SSPX chapels in our diocese to add to the debate.
I am sure that there will be dissappointment in the SSPX camp that the Excommunication was lifted not declared null and void. Fr Zuhlsdorf has an excellent piece which speaks about the future, similarly Fr Tim's post is well worth reading.
I really do admire the Holy Father for his ecumenical bravery, the outrageous Bishop Williamson is going to cause a great deal of criticism to be directed towards him.