I found this group when The Journal of Light Construction put one of their projects on the back cover. http://www.wholetrees.com Very nice work and they have some workshops coming up next month at their home base in SW Wisconsin.
So I sent Ben Law an email and asked him. His response:
Really flat out here at present, just completing book and about to start a really interesting build at sustainability centre. The new book is 'Roundwood Timber Framing' and it is a practical manual on building roundwood timber frames, including new jointing techniques, suitable timber species, suitable tools, case studies and galleries of roundwood projects, over 300 photos, line drawings etc Species selection suitable for USA and Europe, published August 2010