Someone was asking about these just the other day, and now here they are!
Well, some of them, anyway. The card catalogue says there are just over 30,000 records. It covers the Archdeaconry of Richmond and the Peculiar of Knaresborough at the moment, with the Peculiar of Masham to be added at a later date.
http://search.ancestry.co.uk/search/db.aspx?dbid=5246
come?