Recently, St. Tikhon's press reprinted St. Nikolai of Zica's essay The Universe as Signs and Symbols. I've ordered it, but haven't received it in the mail yet, so I can't personally comment on it, though from the description it also appears to include an outline of Orthodox natural philosophy.
Have you had a chance to read this yet? I have it on my to-buy list and was wondering how it was...
"I, Lucian, wrote this, I who am skilled in what is old and foolish; For what men think wise is foolish. So then nothing that the mind of man can conceive is certain; What you admire, seems ridiculous to others." - St. Lucian of Antioch