I have just learned that His Grace Bishop Savas of Troas, who i s the Chancellor of the Greek Orthodox Archdiocese in America is blogging. He is presently on sabbatical and he is in Florence Italy. I believe he is the first Orthodox Bishop to blog.
Go and welcome His Grace to the world of blogging!
Bishop Seraphim (Sigrist), the retired Bishop of Sendai, has been blogging on LiveJournal since 2002.