I haven't quite yet figured out how to yet but in my 2 minutes of research it looks pretty simple! We couldn't be happier! The bitcoin community is awesome and I'm pretty excited to use the blockchain to record the event and our agreements once we get those completed!
I hope you divorce soon, and that your kids are ugly and retarded if you have any. I'll write it on the blockchain just after the record of your marriage.
Please, don't forget the blockchain wasn't designed for this purpose. Just joking...
Congratulations to the newlyweds! If I ever get married I will definitely consider this sort of wedding as one of the options.