I was looking for a simple (flash based) slideshow, that would be able to advance by itself and also be able to skip slides if needed. I spent several days looking for a free one, because I believed there is a free version of everything, just to be found. Unfortunately for me and fortunately for you, I can save a few days worth of futile search and suggest paying for this highly configurable extension. I certainly would have earned more than I spent if I had bought this right away and not wasted a lot of time installing and trialling various not worthwile alternatives.
I especially like the automated installer - you only need the ProJoom installer. If you buy one of their extensions, get the hash code and paste it into the installer, the software does all the rest!
Five out of five.