I did a quick search and couldn't find anything relevant about extraterrestrial life and Orthodoxy, just the usual links to Fr. Seraphim Rose and his writings on the subject (however, arguing the validity or "orthodoxy" of his opinions is not something I want to touch this early in the morning!)
I did find some of the usual weird stuff - Chariots of the Gods is alive and flourishing on the internet. Check out this one at:http://www.crystalinks.com/ufohistory.html
We've got the usual Ezekial's chariot, the big eyed grey aliens, and a bunch of Eastern and Western icons/paintings full of alien spacecraft. Go down about 2/3 and you'll find the great story of the alien spacecraft that had a close encounter (no pun intended) with the Orthodox church in Orenberg Russia in 1824. They just can't seem to keep those things in the air - they travel 20 million light years to crash here!
Well "Klaatu barada nikto" to everyone.