The excommunication is also significant because it is part of a bigger issue: the increasingly vocal mobilization called "Womenpriests". Sojourners ran an article in 2006 about the ordination of 8 Roman Catholic women on a riverboat in Pittsburgh (so as not to be "in" any certain diocese). The Times article says that Janice Sevre-Duszynska, the individual in whose ordination Fr. Roy participated, is the 35th American woman to be ordained in this movement.
Rose Marie Berger hasn't written anything about Fr. Roy yet, either on her blog or at God's Politics, but we might expect something soon.