The publication has now posted a typically witty chat with drummer Nick Mason from the same time period. Mason's dry humor is always a nice counterpoint to the seriousness of the other two guys. I didn't get as many new nuggets of info in Mason's interview, but it's worth a read.
Oh and by the way, if you don't have Is There Anybody Out There? and are a Floyd fan, you need to get it. Roger Waters shouting at the crowd to "Clap! Come On! Have a GOOD TIME!!! ENJOY YOURSELVES!!!" at the front end of Run Like Hell is worth the admission alone.
Plus, you get the song "Last Few Bricks," which is a medley that was inserted before "Goodbye Cruel World" to give the crew a chance to finish placing the last few bricks in the wall at the end of the first set. Many of the other songs are extended. "The Show Must Go On" has an extra verse, for example, and "Empty Spaces" is totally different from the album version.
I recently found a bootleg of one of the rehearsals for these Wall shows and Waters barks orders left right and center at band, crew, sound guys, the guys building the wall across the stage. He is large and in charge! Pretty classic.
Read Mason's interview here.