I understand that this specific project is confined to ABOK. But I would like to voice a humble opinion.
Even though the great book is the most comprehensive work to date, why stop there? How about a database in which all the knots of ABOK is presented, and then as many knots that are not? In such a database, additional information could be added, as names in other languages, suitability in various materials and so forth.
To be honest, the book is lacking in post Ashley materials. And actually, some knots have been discovered/invented since. Who knows, maybe another one will se the light of day.
Regarding databases, excel and volunteers, Wiki springs to mind. As a package, The fileformat involved would be at the backend (no need to muck about with proprietary fileformats), and volunteers can do a little bit of work whenever suitable. Most importantly, no one person need, or should, pull all the weight. That is harmful to the project when he gets tired or fall off the web so to speak.
Through a web interface no one need to be excluded who would want to give a hand. To me it would be valuable to be able to make searches on materials used, conditions for use, name (in various languages), ABOK number, tied in bight or at end. Well the list could be made long. But I believe a wiki could fit the bill.
To make the information even more accessible to people outside the knotting community, the knots could be presented at the already established Wikipedia and then do the indexing there as well ... Some knots are already up.
Best regards!
Wed