I've only just picked up an issue of this Sci-fi fan favorite magazine and can only say that it's brilliant! The quality is top notch in comparison with the slew of cheaper magazines put out at this time. As well as covering the upcoming Star Wars sequel, issue #18 of Starlog also has a feature on Battlestar Galactica which I also like mainly as it stylistically borrowed so much from Lucas (probably down to Dykstra's involvement). There's also an update on the Star Trek motion picture which was in development at the time and several articles on monsters and make-up that one might expect to find in Famous Monsters of Filmland.
The article on 'the continuing adventures of Luke Skywalker' is a very interesting read. I'm surprised that Empire had a name this early on (a good year and a half before the film's release), albeit a working title. Gary Kurtz is really hammering home the point that 'Star Wars II' is actually 'Episode IV' and it's interesting to see the discussions on how confusing this could get for fans in the future. We coped with it Gary! Although he keeps referring to a possible 12 installments... I'm kind of glad they left it at 6!