Jason Stanley has a post “Epistemic Modals, Relative Truth, and Contextualism” at the epistemology group weblog Certain Doubts, together with a lively comments thread.
This reminds me that on my summer plate is a paper that Thony Gillies and I plan to write about epistemic modals in context, provisionally entitled ‘Might’ Made Right. Gotta get cracking.
BTW: There are more or less obvious connections to the topic Peter Lasersohn explores in his recent draft on predicates of personal taste, “noted below”:http://semantics-online.org/2004/07/lasersohn_on_personal_taste.