The Cruciverbalists maintian a website at http://www.cruciverb.com/ – this is a website oriented to Crossword puzzles.
One feature of this site is the mailist referred to as Cruciverb-L. This is a privately maintained subscription list for discussions about crossword puzzles. You can sign-up or edit your list subscription at http://www.cruciverb.com/mailman/listinfo/cruciverb-l