Display flash, video, photo in slideshow
The Views Slideshow module can loop through more than just Images.  You can even have it look through rendered nodes or custom content.

By using the Views theme and template features and views slideshow you should be able to mix nearly any content you want.  

There is a video by Bob Christenson that gives a very good intro to the Views Slideshow module.  Though it is for D6, most of the content is similar enough to be useful in Drupal 7.