I just received a STD for my cousin's "wedding" next August. It says "Sally and Jim are getting married!" It fails to mention they got married last February. They weren't very secretive about it, so it's not like they're lying to everyone. But it still irritates the crap out of me that they are calling it a wedding and pretending they aren't already married.
In the last year, I've also had two cousins have shotgun weddings where no one was invited to the ceremony. For one, we weren't invited to the reception, and they claimed they would have a bigger reception for the whole family, but so far that hasn't happened.