FUDforum - خوراک RDF
http://fudforum.org/forum/index.php
Subforums?
http://fudforum.org/forum/index.phpindex.php?t=rview&goto=33408&th=6977#msg_33408
As in, smaller forums inside a larger one. I believe this would be a useful addition, to not only unclutter main forum lists, but to also keep a higher level of organization. Very useful, I would say.