The Copenhagen Diagnosis
Some of the world's best climate researchers have put together a report, the Copenhagen Diagnosis, which updates the readers on what has happened in climate research since the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report.
The report is targeted towards policy makers, the media, and the general public, and as such it "synthesize the most policy-relevant climate science published since the close-off of material for the last IPCC report", allowing policy makers to make informed decisions based on all available (peer-reviewed) material, and not just material available 3 years ago.
If you want to be informed about the current state of climate research, and on our knowledge of AGW, then read this report. It won't include any of the many manufactured controversies, just the pure science, which has been through a proper peer-review process.