Here's a cheat sheet:
http://boardgamegeek.com/filepage/108970/star-wars-miniatures-rules-referenceIt has the basics for new players, but it also has the pre-game, pre-round, and resolving effects sequences. Having those 3 handy will probably answer the majority of rules questions that might come up during a game, even for experienced players.
It's two pages, so front-back makes it a handy one-page reference. (It's definitely not a tutorial, though. You need to learn from somewhere else. This is just a reminder of the rules, not something that can teach.)
(Comments welcome.)