Well, I take photos with my Canon digital camera more than often, so I do like edit and archive all my photo in an easy way. I choose photo2vcd to do this job and it helps me burn my sildeshow to VCD/DVD with quiter good effects.
For creating slideshows I use Pictures to exe which is available as a download at http://www.wnsoft.com
The software is cheap at around $24 and you can download a trial version free.
Some slideshows using Pictures to exe are here:- http://homepage.ntlworld.com/paul.newsom
There is also a forum which is very active and helpful