Sure, Star Wars campaigns have been common since 1977, with many a version of Traveller twisted to fit the first episode of Lucas’s space epic (or vice versa). Since the late 80s with the first (of 2-4 depending on how you count them) official Star Wars game, a ton of novels, the prequels, and expanded universe (which the original WEG version helped create) it’s hard to not see Star Wars as a fully developed setting with fairly known eras, places, and plots.
But as Space:1970 recently reminded me there is a cannon that you can build on that is mostly superseded. Marvel had a long running Star Wars comic. While the original Star Wars and The Empire Strikes Back were both in the mainline of the series The Return of the Jedi was not, being relegated to its own miniseries. I’m not sure why, but given the dates I suspect it was simply a product of the comics industry at the time. Dark Horse has republished all these issues. That said, Wookiepedia reports the comics are marginal at best in terms of continuity. To me that spells opportunity.
So, the second Star Wars idea to make it to PtG,PtB (the first was my take on an old RPG.net thread) is to use this simpler Star Wars. Much like a Brian Daley oriented corporate sector game this would be more a classic space opera game set against the back drop of the first two movies (you know, the good ones). The cannon would be Star Wars, The Empire Strikes back, their novelizations, and the Marvel comic up to issue 80. For a system I’d hunt down the old WEG Star Wars (any edition) and the free version of D6 Space.
While not a campaign for the hard core Star Wars fan for a GM looking for an easily explained universe for space opera in either the heroic or scoundrel mode this is a fine background. Plus, the research: reading some cool if obscure comics and watching the best two Star Wars movies, would be great fun.