My Slideshow option
Slideshows are great, but we are clearly missing a retail opportunity here. It would be great for customers to be able to create their own slideshow using a new ADD TO MY SLIDESHOW button.
They can view their "MY SLIDESHOW" for free with the watermarks of course, but only while the event is current. Therefore a nice reminder at the end that the slideshow is available only for a limited time and can be purchased and downloaded would probably be a nice reminder.
The purchasing of the slideshow could Perhaps be a two tier option (£xx.xx per image with watermark or £xx.xx without watermark).
Either way, this has great opportunities for customers to create their own e-wedding album etc.