Like Pecha Kucha.
You've never heard of it? I hadn't either, until last summer when I was asked to do one for the SC Arts Commission. According to the Pecha Kucha site, it's "a simple presentation format where you show 20 images, each for 20 seconds. The images forward automatically and you talk along to the images." It was originally used by architects because "they talk too much."
I put together a Powerpoint presentation on "sense of place"-- how my surroundings informed the setting of my fiction. I used my own photos. 20 photos for 20 seconds each.
If you get the chance to attend or participate in Pecha Kucha, Do It. It's addictive. Take a look at a few examples here. I like the Wayward Plants presentation.