The replies and information are very good.
Questions regarding the 15 autocephalous (independent) bodies:
. Are these churches confined geographically? Or do they have any any presence" outside their geographical region (i.e., Serbian Church in the United States)?
I echo Julina's response

Where I live, there are more than half a dozen parishes of at least four different jurisdictions. During Lent, parishes take turns hosting the Saturday evening Vespers. Its wonderful to pray together, and experience the different expressions of the same iconography, hymns, etc. Then of course, afterward we eat together - we are EO

- and can share our fasting recipes, too.
The present jurisdictions have a worldwide presence, too. South and Central America, Africa, Cuba (both Russian and Greek) and within the last two or so years a GOrthodox Church in now both South and North Korea. I don't know as much about other jurisdictions footprints worldwide. In general, the Church tends to follow the footsteps of emigrants; in this manner permanent communities are planted and grow. It is not just a matter of "converting" newcomers to these Churches, they are received
into a Christian family and nourished there long term.
. Is the title "pope" reserved only for the Bishop of Alexandria? I'm interested in a fuller explanation for the title of "pope" as applied in the Eastern Orthodox churches.
IIRC, pope is a regionalism meaning "papa/daddy". Thus the title pope is of African origin and is still used for the episkopos there( and in Rome).
. What is the Eastern Orthodox concept regarding "full communion" and related terms? Sorry if that's not a clear question...I guess I'm mainly asking the relationship between the EO bodies, and between EO and the Oriental Churches, etc.
The sharing of sacraments. We can (and do) receive communion in any parish in communion with us, worldwide. The OO did not accept a 5th. c. Ecumenical Council (Calcedon). The theological issues - if you're really interested, may I leave that for someone else. But as mentioned, after a long period of talks ( in God-time its only been the blink of an eye

)it seems the indication 'the same' was expressed in different way. We await finalization.
. Could you describe a worship service?
That is hard, maybe. The Liturgy is preceded by Orthros (Psalms and other Scripture), about an hour or so - depending on the tone of the week and the chanter. Some people arrive for only Liturgy; depending on how Orthros goes, I've found one can arrive on time and be ten minutes early or ten minutes late

Then Liturgy, about an hour and a half, cycles through prayers and prepearations, readings -- all re-presenting the life and ministry of Christ. This re-presentation is echoed even by the times of opening and closing of the "Royal Doors" in the iconostasis. (Sometimes following Liturgy there can be one or more small services, perhaps a blessing of the loaves - or a memorial for a departed family member.)
The Liturgy is mostly chanted, and composed about 90% of scriptural quotes. Some hymns are the same for every Liturgy, others change (one of 8 Resurrection hymns, hymns for the Liturgical season, ie Winter or Spring 'Lent', particular Saints, Paschal or Pentecostal, etc.).
The Liturgy is boldly, repeatedly and joyfully Trinitarian - an aspect of worship I didn't experience in other Church's worship.
One line from the Liturgy that comes to mind now:
"Let us commit ourselves and one another and our whole life to Christ our God."
(it makes my heart skip

)
LDG[/quote]