Crescent Hill Books, publisher of many collaborative design books (we told you about one of their logo books a ways back), is currently accepting submissions for a new book on eco-conscious design, The Big Book of Green Design. Over 1,000 entries, printed on environmentally-friendly paper, and no charge to submit.
This link will take you to their submission site. You'll need to take a moment create an account in order to view the various books and to submit your own entries.
Don't dilly-dally, either. Deadline is December 1, and November is a short month!