How to Stream Photo via Apple TV

In a dedicated TechNote Apple explains how to stream photos from a computer to the Apple TV via iTunes. However, iTunes and Apple TV do not stream photo slideshows made in iPhoto, you can either stream the entire photo library or just selected albums and use Apple TV's slideshow function to view photos in a slideshow. Music used for photo slideshows on Apple TV also has to be streamed from iTunes. This function can be used to stream photos from a guest notebook. It would also be nice if Apple could update the Apple TV to adapt the interface to the last features from iPhoto.