If you mean totally random self-running of the slide show, I don't believe
so. Order is typically considered to be a desirable function of a
presentation.
However, if the show is being manually delivered you can present the slides
in any order you choose and you can also create Custom Shows. Custom Shows
are variations on your main presentation in which you can specify whatever
order you wish as well as dictate which slides are included/excluded in each
variation.
The one option I can think of is to save the slides as a picture format,
then use a program such as iPhoto to present the slides in random order.
HTH |:>)