From One magazine, a fine overview of the OCA:
the Middle East, as well as Alaska Natives and recent converts, especially from the reformed churches.The ancient rites of the church of Byzantium unite these Orthodox Christians. Rooted in the New World for more than a century, these North American churches retain strong bonds with the Old World, are divided into a number of ethnic jurisdictions — Albanian, Arab, Belarussian, Bulgarian, Greek, Romanian, Russian, Rusyn, Serbian and Ukrainian — and typically celebrate the divine mysteries in their respective liturgical languages.
One body has attempted to transcend these cultural differences. Originally a jurisdiction of the Russian Orthodox Church, the Orthodox Church in America was established in 1970 and is led by a primate with the title of archbishop of Washington, metropolitan of all America and Canada.
More: http://www.cnewa.org/default.aspx?ID=3595&pagetypeID=4&sitecode=HQ&pageno=1


