Anyone know of a web page slideshow script that will dynamicaly pull photos from a directory without having to hard code the file names into the script? It doesn't have to be asp based as long as it works on a windows server. Thanks!

www.DynamicDrive.com has a pretty nice slideshow.
Here are some ideas:

http://www.dynamicdrive.com/dynamicindex17/featuredcontentslider.htm (bottom right of the examples)
http://www.dynamicdrive.com/dynamicindex4/stepcarousel.htm

If php works for you, you might look around hotscripts.com image gallery scripts. It seems to me I ran across some php single-file scripts that you dropped in a directory full of images and got instant image gallery and slideshow capabilities.

I would use Flash. In particular I would use Simple Viewer - http://www.simpleviewer.net/simpleviewer/

You can set it to show a Flickr photostream if you don't want to have to edit any text files.