Not a line thing, but sort of a line thing:
When I used to march in the SWW parade (I'm a member of the Rebel Legion fan/costume group - we march there every year), we usually have a "pilots weekend". Nearly all the members who have pilot gear wear it, and afterwards the nice CM Manager at Star Tours let us all ride it in our pilot gear.
So, imagine guests watching a whole group of x/a/b/y-wing pilots marching up through the FP line and getting into the ride vehicle! The reactions from guest is great - especially the wide-eyed little kids! We try to stay in character (super-heroic and awesome - plus pilots just rule in general)
The best time was right before ST was going for it's refurb. The manager let us up in the Admiral Ackbar room and we could see all the guests in the line and they could see us! We waved at the guests - it was simply awesome. Quite frankly, it's the only time I've felt like a Disney performer! Plus, our costumes are super-screen accurate, which made it even more fun. We looked like we belonged in there.