I'd like a guild more than a marriage. Its a little more open-ended. But on that note it would be nice to see more two player interactions. I mean, if we can nibble piggies...
i'm pretty sure that actual married couples will be playing the game together. making it easy for them to share their stuff would be cool.
also, in the past couple of tests i operated in kind of "business partnerships" with zeeberk and then with quintus .. setting up pork and milk fountains and operating them together.
i should hope a guild for two would suffice in all the situations i'm describing.