Have you seen my flash photo slideshow yet? I just upgraded it to the new Slideshowpro 1.60. I'm also using SSP Director which is a super sweet admin for it. It allows you to create albums and galleries and edit every aspect of your slideshow online. No messing with creating XML files by hand!
Slideshowpro is now even more advanced fully supporting video! What a godsend. Any professional photographer who wants to display photographs on their website should be using this script in my opinion. It is by far the best flash photo gallery slideshow you can get right now.
Yes you can embed your favorite audio track in the slideshow, but don't! No one likes having to listen to someone else's favorite music. Not everyone has the same tastes. Also it's annoying if you're already listening to music on your computer. Let your photos speak for themselves!