Forum Moderators: open
If you believe the page is worthy of a unqiue listing (i.e. it is self-sufficient and belongs in a different cat altogether from the one your main page is listed at), it's always worth a submission.
The best advice I've gotten from DMOZ folks is the same advice Ron Popeil gives for his TV Rotisserie. "Submit It and Forgit It". If it gets in, cool, if not, don't worry. It's not worth the ulcer.
G.