You could do a complete Star Wars film collection...use the standard DVD cases, but have the extra tray so you have 2 disks in there.
That way you can get the OOT, the original version of SW without the episode 4, the PT, the clone wars cartoon, the SE DVD, the SE VHS, Musical Journey, the DVD Bonus, the ewoks cartoon, the ewoks films, the droids cartoons....plus plenty of bonus stuff.
When you think about it, you could have a 32 disk set of just about everything Star Wars that's ever been released up to Episode 3 being released on DVD. There may even be room for the rumored bonus disk in the 6 movie set that's supposed to have deleted scenes from the OT (wouldn't bank on this....probably will change)....