There has been very little information and or training in the field of "Green Home" valuation and things are starting to change!  In Vancouver BC this year an international conference was held on building sustainablity and its effect on valuation. While this pertains primarily to commercial buildings it would hard to imagine that this movement would not funnel down to all aspect of building including residential.

According to the Vancouver Valuation Accord's Website:  "The Vancouver Valuation Accord is a response to the evolving importance of sustainability and the need for its implications to be understood in valuations and appraisals. It is a commitment to review sustainability and valuation, including education, standards and practices, with the aim of improving understanding of their relationship. The Accord will be developed and managed through this web site"

If you are interested in all of the aspects of Green Building check out:http://www.vancouveraccord.org/about.html