Robin Good: SlideshowBox is an elegant and well-designed collection of stylish HTML and Flash slideshow gallery templates that allow you to create, customize and publish photo slide shows by using your favorite RSS image feed or XML source.
"SlideshowBox includes 12 HTML5 (based on
Flash slideshows supported by all Adobe
Flash CS versions.
slideshows (iPhone/iPad friendly)."
You can add photos to your SlideshowBox
slideshows using standard XML files or
by using Flickr, Picasa, Photobucket and
SmugMug photo feeds (RSS 2.0 feeds).
How to use it: http://www.slideshowbox.com/how-to-use.html
Online panel (to choose and customize your photo slideshow look and feel): http://www.slideshowbox.com/online-panel.html
Free version with watermark: http://www.slideshowbox.com/free-download.html