I have just discovered Pecha Kucha - a presentation format in which a presenter shows 20 images for 20 seconds apiece, for a total time of 6 minutes, 40 seconds.
Looks like the driving force was similar to the one that inspired my Knowledge Cafes - a desire to avoid Death by Powerpoint.
I wonder if I could adapt the idea to create a variation of my Knowledge Cafe? But I cannot believe that they have patented the process!