I think the pictures are perfect. Pictures entertain the more creative side of the brain so that it doesn't start distracting the more logical side from paying attention. All of your pictures tie in well with your topic. By reusing images the creative side of the brain will have something to do, by flooding the watcher with memories of what was going on last time they saw that image. Finally, for those who have given up on paying attention to your material (perhaps it's not relevant, perhaps they just came because a friend was coming, perhaps their stomach hurts), pictures give them a reason to keep looking up.

I help pjf with his talks all the time. We've found through experience, that fast moving slides with lots of pictures, get a much better reaction than a few pictures here and there.

If asked, I'd say that one picture every 4-5 slides is not a bad goal to aim for, but it should be a *minimum*. It depends a lot on how fast your slides move. I'd suggest you want one picture every 90 seconds. If you spend 2 minutes per slide, that's one picture per slide. If you spend 6 - 10 seconds per slide (as we tend to do these days) then that's on picture every 9 - 15 slides. After enough talks you get a feel for it though.

Anyway, I'm sorry I didn't comment sooner, but thanks for putting these up; I found it very interesting and am sad I wasn't as OSCON to attend!

jarich