My daughter hit some button on my computer and all of a sudden a slideshow appeared with photos we had taken and there was music playing. The photos seemed to be in a movie format with closeups and pans.
I'm sure you and your fiance probably knew that such technology existed but in case you're like me (and Dave) and didn't know it's a great find!
Lots of couples make slideshows of their life together to play at the rehearsal dinner or wedding and bridesmaids will put a slideshow together of the bride and groom as children through adulthood as part of the entertainment for the party.
I always thought you had to hire someone to do this but I guess you don't. You may want to consult your wedding band or DJ for slideshow playlist suggestions.
I do know couples that have played slideshows at their wedding reception but my personal opinion is that it's better to have a slideshow at a pre-wedding party and wherever you do show it keep it brief -- 5-7 minutes max.