Meh still absolutely no progress but perhaps I will be inspired to resume work because:
RoboSub Update
I went to the 2014 RoboSub (semi-)finals and spent a ton of time just wandering around talking to teams about their subs! Quite a few brand new submarines and even a couple first-year teams in the finals. Finals start later today so be sure to check out the live stream at http://robosub.org/ if you have any interest in this kind of stuff.