Kenny Pearce has up a draft of a paper on Kant's applied ethics that looks interesting, "Kant's 'Bad' Examples":

Many contemporary 'Kantian' ethicists ignore or even malign Kant's applied ethics. I argue that this is misguided: when Kant's theory is properly understood, it can be shown that many of his supposedly objectionable conclusions are well supported by it. I consider five of Kant's applications and argue that each of them can be supported by means of his theory of personality and the role it plays in the derivation of moral laws. The applications I consider are: (I) the permissibility of domestic servitude; (II) the impossibility of non-marital sexual consent; (III) the denial of suffrage to women and domestic servants; (IV) the impermissibility of suicide and selling one's organs; and (V) the impermissibility of 'unnatural' sex, including masturbation and homosexuality.

He's welcoming any comments people might have.