I've threatened folks with the possibility of a Star Wars marathon once all the movies are out on DVD. As that looms closer, here's a rundown of possible marathon options, from basic to extreme:
The Movies
This marathon is just the six movies, shown in order:
Episode I - The Phantom Menace
Episode II - Attack of the Clones
Episode III - Revenge of the Sith
Episode IV - A New Hope
Episode V - The Empire Strikes Back
Episode VI - Return of the Jedi
The Canon
This version adds the canonical Clone Wars series to the mix. We did this bit for the midnight premier, watching Clone Wars prior to going to see Revenge of the Sith.
Episode I - The Phantom Menace
Episode II - Attack of the Clones
Clone Wars (season two should be out on DVD when Revenge of the Sith is....)
Episode III - Revenge of the Sith
Episode IV - A New Hope
Episode V - The Empire Strikes Back
Episode VI - Return of the Jedi
Wackiness
This (possibly deadly) version adds in quite a few noncanonical television specials and shows.
Episode I - The Phantom Menace
Episode II - Attack of the Clones
Clone Wars
Episode III - Revenge of the Sith
Droids
Episode IV - A New Hope
The Star Wars Holiday Special
Ewoks
Episode V - The Empire Strikes Back
The Ewok Adventure
Ewoks: The Battle for Endor
Episode VI - Return of the Jedi