I'd say this is one of the most important announcements for years, possibly since they were first published. In some ways it's even more important than Child itself in that almost everything in Child is available elsewhere and has been much published. Almost everyone is text based so hopefully this availablilty should go a long way to redressing the enormous imbalance between text study and tune study.
I have had a set for several years now, but this is still really exciting news.
I take my hat off to you, sir!
Have you announced this on the Ballad List yet?