Tom Roeper's "How the Emergence of Propositions Separates Strict Interfaces from General Inference," and María Biezma's "Optatives: Deriving Desirability from Scalar Alternatives" has appeared in the Proceedings of Sinn und Bedeutung 15. Take a look at:
http://uvs.uni-saarland.de/monographien/frontdoor.php?source_opus=30&la=de
