Wedding Memories as a Federated Grid
So any wedding is assigned some sort of Jini (Ninja) compatible bar code included in invitation and available from wedding web site
Bride, Groom, Guests and support staff (priests, photographers ..) load bar code into devices ((digital) cameras, hymn books, presents ...)
After wedding all involved go home and over next weeks processed photos, unwrapped gifts etc. register with wedding server from sites around the world
Services include automatically linking of photos to people (pattern recognition), image correction, generation of thank you letters, production of customized albums etc.