From filmthreat.com:

We just received an email report in regards to the Star Wars seminar that went down last Saturday in Los Angeles. Apparently, Rick McCallum showed the opening of the original "Star Wars" from '77 to show how badly the negative had aged - it was the version without the "Episode 4: A NEW HOPE" slug. They also showed what McCallum called a tech reel, which is what they may have shown at the Celebration in Indianapolis - the m.o.s reel of images with music. Then they showed something called the "Sydney" reel, which was the first set of film outputs they made from dailies early in the shoot and it was full of shots from scenes that were cut from the film.

Hit the link above for a rundown of the scenes and more.