Quick update, just because it's so interesting. I just spoke with a gentleman named Goren Lange, from Pin Interactive, a Swedish company. They create games designed for disabled people and have won an Independent Games Festival award in the past. They've shipped a 3-D game tailored for the blind, and they're working on a game with diabetic children in mind. Lange tells me he's looking to explore more WoW-like games to accomplish their goal of reaching more disabled kids.
What interested me most was his aversion to calling his games part of the serious games genre. Expect something more at length after the show.