I remember reading about the survey of journal publications on Slashdot. There still seem to be a few "highly regarded" scientist types (members of the National Academy of Sciences) that remain skeptical. Lindzen and Seitz are the two NAS members (according to the wiki page on warming skeptics). I also read recently that a U.N. committe assigned to study climate change revised downward their estimaet of how much man's activity was responsible for the measured changes.

http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2006/12/10/nclimate10.xml

My personal opinion is that it *is* happening, but that it's also being exagerrated. Like you said, the things we would do to prevent greenhouse gas production are pretty reasonable, so we should probably be doing them anyway.