I've listened to most of these, and I highly recommend them

Audio recordings now available for the International Conference on Climate Change « The Global Warming Challenge

On March 2-4 2008, more than 500 scientists, economists, and policy analysts from around the world met in New York City for the inaugural International Conference on Climate Change. The audio recordings of all 103 presentations from all five tracks (paleoclimatology, climatology, impacts, economics, and politics) are now available on a 35-CD set. It is clear that there is no scientific consensus on the causes and consequences of climate change nor on the direction of the changes.

The complete set is available from The Heartland Institute for $119.
Call (312) 377-4000 to order, or use the online order form at http://www.heartland.org/newyork08/proceedings.html.

The recordings are also available online here.