OK, so the title is a bit misleading. I think this is really interesting. Using visualization to show the harmony of the Gospels. This area of visualization has implications in all types of areas, engineering, business, statistics, finance, etc. so why not leverage this technique for Biblical studies?

I would like to see this same idea used to show the cross-referencing of books of the Bible. Each book is a node and each link weight/color would be the number of times a book cross-references another book. Flash/Ajax would allow you to apply searching criteria to it to show you only direct quotes from one book to another, or maybe only similar wording/phrasing from one book to another.

I would be interested to know of any other projects that are using these types of techniques for Biblical studies.