I'll be giving a talk in Boston on the 28th @ 3:00 p.m.. I'd tell you where if I knew, but I don't. It's the second talk in the "What Epistemology is Not" colloquium (III-H).
Here's a handout.
Abstract: Mentalists say that two subjects have the same evidence if these subjects are in the same non-factive mental states. Mentalism doesn’t tell us what evidence is. Mentalism doesn’t tell us it is to have evidence. The mentalist could say that evidence consists of facts or true propositions. The mentalist could say that our evidence will include any proposition that we know by means of observation. Mentalism could say either of these things, but it cannot say both of these things. That’s why we know that the mentalist is mistaken. Or, so I argue. After showing that we have evidence the mentalist says we cannot, I offer an argument for externalism about justified belief. I argue that our experiential beliefs can be non-inferentially justified only if they are true.