The url is: http://www.ipcc.ch/. This is the Intergovernmental Panel on Climate Change
Another is: http://www.pnas.org/ which is the homepage fro the Proceedings of the National Academy of Sciences. A search on "Global Warning" will bring up a number of articles that deal with the issue, pro and con.
One that I read argues the possibility that it is non-CO2 gases that are the real problem, for example, refelcting (sort of) what Mav has been saying. The difference being that the conclusions in the Proceedings are not nearly as dogmatic as Daly's.
Still, the Greening Earth site makes interesting reading. Their concentration on the physical sea level measurements is interesting. I understand the IPCC (and NASA and others) have started using satellite based measurements. (Or maybe have been using it for a while) which may resolve that particular issue.
The real issue is to come up with something to explain all the phenomena - the purported rising sea level, climate changes, glacier and snow pack data and all the rest. Saying it's normal climatic variation begs the question as it has a lot of the earmarks of a non-falsifiable claim. If the Greening people (and others) want to be taken seriously, they really need to do more than say "see, this piece doesn't fit, that means the whole thing is wrong". IMO anyway.