Hi.
Welcome to the forum, and good luck with the study. Davids' site can be found at www.gmagames.com, and there is a contact form there. Alternatively, your very welcome to E-mail me on dark at xgam dot org and I'll send you his address directly.
Appologies for the miner secrecy, but I'm not sure how much he wants' his address around online, --- stil I can personally say he's easily contactable.
Other key people you might wish to talk to are Phil vlasac of pcs games www.pcsgames.net, jim kitchin of kitchinsinc, www.kitchensinc.net, Tom ward of Usa games, http://www.usagamesinteractive.com/, Ron Schamahorn editer of the audeasy accessible games web magazine, and John banic of 7-128 software, www.7-128.com.
All of the above have been pretty instruemental in games developement, and have been around for a significant time, ---- with the exception of John, who's organization has a lot of resources and information and runs the top gameing related websites pole.
While there are some pretty amazing new people in accessible games developement currently (or comparatively new), those are probably the people who've been around longest and seen most change, and are stil going.
You might considder contacting the audeasy list on http://audyssey.org/ where many of these people and others with much experience hang out.
Oh, and as we share a country, your welcome to talk to me too if you like, ---- though I can't imagine what good that would do ;D.
Btw, I've moved this from the off topic room sinse these sorts of efforts and chances for people in the world of game design to actually know that accessible games exist don't come along too often and deserve all our support.
hth.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)