Tripadvisor have started a free service of slideshow with music from your holiday pictures. They have beautiful themes to go with your holiday settings like Beach, Family, Romantic, Outdoors, etc.
Also one can upload the pictures from their Facebook, Picasa, Flickr accounts or even MyComputer etc.
Moreover - the slideshow can be downloaded on the computer or DVD.
Overall, a good bet for your vacation photos. Try it out.