Here is the site of the webcast and I think this is where the compost conference excerpts will be  http://www.arpinbroadcastnetwork.com/Arpin-COMPOST-2012.html

THE 2012 GROUNDS & GARDENS MINIGUIDE
As usual, our garden & landscaping resource booklet came
out in time for the RI Flower Show.  However, this year
was different. The booklet has become even more sustainable
and user friendly - down to 8 pages!  It still has the
basic pointers, and a list of resources at the back.
The more extensive info is on the Landscaping page of
our website, at: http://toxicsinfo.org/lesstoxic.htm