So, those who wonder what I've been up to for the last six years or so, here's a review of the project.
In brief, it involved Marquette's making high-quality scans of every page of manuscript, typescript, galley, proof, and misc (e.g. maps and small sketches) of LORD OF THE RINGS material and organizing them so it's now possible to trace through draft by draft to locate changes in phrasing and concepts. Last fall's exhibit at Marquette shows the results.*
Thanks to Brad Eden for the link.