FTC released its latest proposed version of Guides for the Use of Environmental Marketing claims October 6, 2010: http://www.ftc.gov/opa/2010/10/greenguide.shtm
Comments are Due December 10, 2010.
At 295 pages, it will take me a bit to digest. On a quick scan it does look like they seriously considered my comments (12 cites!).
An FTC summary of the proposal can be found here. Clarifications of the old guides on: green/eco-friendly claims, seals of approval, clarifying recyclable availability considerations, free of/non-toxic claims, and what timely degradation and composting means. New items include "renewable" materials and energy and carbon offsets. They did not include guidance on using "sustainable," "natural" or "organic."
Stay tuned for more commentary and do submit your own comments to FTC. This rule will affect everyone who makes and buys products.