This short paper focuses on understanding moral dilemmas, Artificial Moral Advisors, and their possible roles in ethical decision-making. After a brief analysis of the philosophical debate around dilemmas, we propose three different classes of dilemmas. We then discuss how AI-based advisors could be used to enhance human ethical decision-making, with a particular focus on three possible AI skills (identifying, presenting and settling dilemmas), as well as on their role as ethical experts. The resulting proposal opens up to new possible uses of AI moral advisors, and to the help they might offer in difficult decisions.