Well, after years of speculating, it would appear that this event is happening - a 10k, half and full marathon on trails and tracks on Dartmoor.
I've spoken to these guys about the route and it's a cracker - must confess that much of it is the route I had picked when I attempted to organise this last year.
I may do the half:
http://www.endurancelife.com/event.asp?series=20&location=51
