The belief of Orthodox Christians everywhere is summed up in the Nicene-Constantinopolitan Creed.
Introduction to the Orthodox Christian Faith from the Orthodox Church in America.
Our Faith: Links from the Greek Orthodox Archdiocese
Questions and Answers on the Orthodox Faith by Fr. Thomas Hopko
First Visit to an Orthodox Church: Twelve Things I Wish I'd Known by Frederica Matthews-Green, a prolific U.S. Orthodox writer.
More about Orthodoxy numerous sources from St. John the Baptist Greek Orthodox Church in Omaha, Ne.
Orthodox Dictionary of Terminology
A link to the SCOBA-affiliated Orthodox jurisdictions in the United States can be found here.