Still here... time flies.
So I know it'd probably be wrong to do so, but has anyone thought about actually tracking down Josh and politely reminding him he was going to release the source code 3 years ago..?
So, what now?
Well, I will prepare the source code for release. It's not a working game, and in my frenzy to get things working I've left huge swaths of code in a half-refactored or half-complete state. But releasing it is the least I can do. I don't imagine it will be of any use to anyone, other than as a monument to a failed dream. Perhaps those who are interested in game engines will glean a thing or two from the engine, as it is a fairly solid piece of engineering, much more solid than the Lua game code.