After many, many pages of comments on the original forum post, the Dusk Engine is now live on GitHub.
From the readme:
The Dusk Engine (concept version named CoronaTiled; pre-beta named Ceramic Tile Engine) is a fully featured game engine for Corona SDK. It’s designed to help you “weed out” extra code for level creation and let you focus on the game mechanics, instead of the level makeup.
That pretty much sums up what Dusk is.
You can get it here: https://github.com/GymbylCoding/Dusk-Engine
Documentation can be found here: https://github.com/GymbylCoding/DuskEngineDocs