Those who are patient enough to sit through the end credits are treated to a nice little surprise (just as the title for "Released by Twentieth Century Fox Film Corporation" rolls off the screen).
For the other five films in the STAR WARS series:
Star Wars Ep. II: Attack Of The Clones (2002)
Star Wars Ep. III: Revenge Of The Sith (2005)
Star Wars Ep. IV: A New Hope (1977)
Star Wars Ep. V: The Empire Strikes Back (1980)
Star Wars Ep. VI: Return Of The Jedi (1983)
Fans of the Star Wars franchise may be interested in these webpages:
Aveleyman.com: From Star Wars To Jedi: The Making Of A Saga
Aveleyman.com: Empire Of Dreams: The Story Of The Star Wars Trilogy
Star Wars.com - the official website
Addendum: Lucas has been tweaking his films again for their Blu-Ray release, and , presumably, this 3D cinema re-release. On the bright side Yoda is much better looking.