Originally posted by: Star Wars Fanatic
I absolutely love this page:
http://www.dvdactive.com/editorial/articles/star-wars-the-changes-part-one.html
Gives a good detailed comparison of the theatrical, speical edition and dvd versionf of the original trilogy. A good way to see how much better the dvd transfer is as well. There are also articles on The Empire Strikes Back and Return Of The Jedi.
The bloke who did all the comparisons is/was a poster on here too
Crackin article - and a lot of work went into it - fair play to the lad 
ANH Changes
ESB Changes...
ROTJ Changes