David Killoren of Coastal Carolina University, who organized a bunch of those split-screen PhilosophyTV and Bloggingheads debates years ago, asked me to comment on a paper for an Online Undergraduate Ethics Conference. The idea was for undergraduates to submit papers and faculty to comment on the best ones.
He sent me a nice paper from Quitterie Gounot of Swarthmore defending a Humean, externalist, and cognitivist approach to moral judgment. Following Peter Railton, I think that's exactly the way to go. There was a nifty point in her paper about the term "prescriptivity", often used as a necessary feature of moral judgment by internalists about the connection between moral judgment and motivation: real prescriptions that doctors give you actually are externalist in the way they motivate action and provide reasons.