Your friend's wedding must have been unique in that sense...I guess that the guests would forever remember the event because of the unique wedding drink they had. I haven't actually been to a wedding that opts to treat its guests with mead instead of the traditional champagne.
This is a first for me - mead in a wedding? That is a totally brilliant idea and it speaks highly to the "unique" characters of the bride and groom. Now, we could all say that they were "MEAD FOR EACH OTHER". Get it?