Following on from Bradshaw’s paper at the conference, he informs me that he has a little book called The ancient church orders coming out soon in the Alcuin/GROW series. At least there will be some more permanent record of the pertinent questions.
This is an excellent series (I have published in it myself), though fiendishly difficult to obtain. The easiest way is through the Alcuin club, whose website now accepts paypal:
The book is not yet up there, but is expected in October… keep checking back.