MovingPhotos3D is a visualization that lets you see your photo library in a new way. It sends your photos flying around the screen in three dimensions. You can see hundreds of pictures form different shapes. It really needs to be seen in action, so check out the video and free trial on my website.
Check the FAQ (support link on this page) if you have any questions. The app starts out in a window, but be sure to try it full-screen (menu option or command-F). Click a photo with the mouse to see it close-up. It takes images from your iPhoto library, Aperture library, or any folder you choose (Preferences option on MovingPhotos3D menu).
If you buy the app, you can use the screen saver version for free as well (the screen saver is a separate download from my website).
If you have any questions before buying, feel free to email me at email@example.com.
Tested on OS X 10.7 Lion.