I manage an online gallery system that frees my clients from the costs and overhead of fielding requests from event attendees (or others) for copies of image files or prints. I provide the client with an event-specific URL and they can focus on their actual jobs and not have to deal with:

Clients have two options:
1) A gallery for shareable files that can be downloaded by site visitors
2) An ecommerce-enabled gallery where visitors can purchase prints or digital downloads through the secure online shopping cart system. The client can elect to handle fulfillment (the client will receive email notification with the details of the purchase requests, and they will receive a monthly report and disbursement of funds collected), or they can elect for me to handle everything.

If you have any questions about this, please do not hesitate to reach out to me for more information.