The Center for American Progress has compiled a "cheat sheet" of sorts — a chronology of the Bush Administration’s failure (refusal?) to listen to intelligence agencies who said the case for war was weak.
Nothing new in it for some of us, but it’s all compiled in one place (PDF version; hyperlinks to sources). Flawed in some respect, because it relies (at times) on "unnamed sources", but still — most of it can’t (or shouldn’t) be ignored. I present it without further comment.