If people are still interested in looking into providers of carbon offsets, "Clean Air-Cool Planet" has evaluated 30 offset providers. (CA-CP is a science-based, non-partisan, 501(c)3 non-profit). Looks like a good starting point.
http://www.cleanair-coolplanet.org/ConsumersGuidetoCarbonOffsets.pdf (1 MB)
Peter Halasz [[User:Pengo]]