I know I am a few days late with announcing it, but the Fourth Assessment report (AR4) is available online, in case you haven’t heard before. It is much easier to read than the 3rd one, with FAQs and boxes explaining the science. It is interesting, and I enjoy reading it. I would read even if it had not such grave implications.
The index and supplementary data are not there yet, but should be until May 7th.