Spent a great amount of time reading the articles from this page: http://secrethistoryofstarwars.com
Learning about the original cut of Revenge of the Sith was especially disheartening because, despite all of its faults, I still enjoy it. But the description of the how Anakin's turn to the dark side originally played out (before George went back and reshot it), appears much more logical and developed. Read here: http://secrethistoryofstarwars.com/theturn.html
Also the rough draft of Episode 1 sounds infinitely better:http://secrethistoryofstarwars.com/thebeginning.html
A lot of good stuff from this site.