There are several of these out there. http://scholar.google.com is a good way to find high quality information without all the political crap.

I've liked the roadmaps from Stanford's Mark Jacobson. If you want the high-level general public view, check out:

http://thesolutionsproject.org

Or for more in depth information you can check out the links on his website, including to the summary papers published in the scientific literature:

http://web.stanford.edu/group/efmh/jacobson/Articles/I/WWS-5...