The [random_images] shortcode displays random attached images.
So far this is one of the best Random image plugins I have fond that works easily right out of the box.
I only gave 4 stars as I felt the plugin is not yet complete, it can be improved further to allow for better random image selections, for example only show images from a certain folder. If it could do that it would be a 5 star solution.
Cheers and thanks for the plugin, I will look forward to the update with a folder selection being added to it soon. Then I will update my review to be 5 stars :)