Plugin for Random Images or Posts?

Hello,

I would like to achieve the following:

a wordpress photostream where I would have an images folder I can continuously upload images into, and have a wordpress website display them in order 1 to infinity automatically. if it was one post or continuous posts whenever the item was scanned, or even single posts per image, that would be fine. the ability to randomize this on every page load would also be nice.

does anybody know if something like this exists?

I’m guessing the hurdles might be a need to continuously scan the directory and keep a list of all files every so often.