This Archbishop excommunicated himself

Milingo's excommunication declared; Episcopal ordinations not recognized
Essential excerpt of the Holy See Press Office's communiqué:

For this public act, both Archbishop Milingo and the four ordained [bishops] incur in a latae sententiae excommunication, envisioned by Canon 1382 of the Code of Canon Law. Moreover, the Church does not recognize and does not intend to recognize in the future these ordinations and all ordinations derived from them, and retains that the canonical status of the four supposed bishops remains that in which they found themselves before the ordination.

Back story: Archbishop Milingo was deposed because of the wild charismatic/tribal excorcisms he performed, he was called to live in Rome, he then disappeared and was married to a Korean lady by the founder of the Moonies. He then returned to Communion with the Catholic Church and went back to Rome renouncing his marriage. A few months ago he disappeared and resurfaced in the USA with a schimatic group of former Catholics.

Jimmy Atkins has a rather frightening piece on the implications of this action, have a look.