Another thread made me to revive this one.
gives all posts.
You can pick subforums, just add ?f=[forum number] to the link; for example this "Announcements" number is 37 (which can be seen in the address bar URL), so the whole link is http://www.ibiblio.org/bgreek/forum/feed.php?f=37.
There are some extra feeds: add ?mode=[mode] to the feed.php link. Modes are news, forums and topics. The last one probably gives a new item for each new topic; I don't know about the other two.
This is how the base feed feed.php shows up in Feedly with certain settings:
https://drive.google.com/file/d/0B6Mr2l ... sp=sharing (if the img tag doesn't work)
Announcements made by B-Greek staff.