A new report published by Oxfam and IIIED is now available from the Oxfam site.
It is available to purchase, or as a FREE PDF download. (link starts download of the resource)
The report is called FAIR MILES.
I have had a quick look and it is a useful document. Thanks to @primageographer for the tipoff to this resource, which will prove useful for preparation for my GA Conference 2010 workshop on this topic....
Here's a description, taken from the Oxfam website: