Well here are fan edits which I think are good and that I have seen.

Star Wars: Episode II: Attack Of The Phantom - The Phantom Editor

This fan edit is so genius that is actually turns AOTC into a good movie, it is a old and classic fan edit. Also it comes with a commentary which will teach you how to become a better editor.

Star Wars: Episode VI: Return Of The Jedi The Dan Edit - Yads

A simple fan edit which just makes ROTJ into a stronger film, it removes alot of the jokey and childish elements and makes it a much darker film. Made by one of my good friends on this site.