For a SWF, a flash file, you can send parameters to the file in querystring within the flash object html. YouTube does this to show more movie files at the end of movie.
In flash, you have a stage that can pan or slide multiple other stages in the main container, producing a slideshow effect.
I just posted a slideshow tip/trick, you can put flash objects in the child containers and they will pan, but if you have audio in the flash, you will have overlapping audio tracks. The script could be expanded with a ajax call to a web service to get data, and repopulate the child containers with dynamic flash objects, or simply just change the flash movie url.