Thanks, pigglet and Tecoyah . . . .
That's a very nice New Scientist article.
The best overall source of info on global warming I think is probably the IPCC website (the purpose of the organization is to assess and synthesize all the science):
http://www.ipcc.ch/
Check out their presentations and graphics.
On the computer modeling issue, to me it seems rather obvious that only a computer is likely to be able to find a meaningful path through the enormous complexity of atmospheric processes.
The IPCC website has a very nice graphic showing how accurate the models have been in "post-dicting" the mean global temperature:
http://www.ipcc.ch/present/graphics/...arge/05.18.jpg
This graphic shows clearly that you can't ignore anthropogenic processes.