Here's a great idea from Concept Shed. The AutoWed Wedding Vending Machine offers "a quick hitch, a couple of rings and a personalised certificate for just £1". According to the maker's blurb, the machine comprises: "Audio prompts, specially produced music, a bespoke retro keyboard and VFD display, ring vending and ticket printer all wrapped up in a Cadillac-pink cabinet with shiny aluminium fittings" , although whether or not pre-nuptial agreements are included, it does not say.
Here's a video of the machine in action:
[Found on Neatorama.]