Well, obviously the 100th episode will be the setting for a wedding. But now I'm thinking it might still be Meredith and Derek getting married. Nobody ever specifically detto that the wedding was going to be in the May 7th episode. Maybe, it is postponed to the season finale because of complications with Izzie o something else like that. I really think that the writers were just trying to trick us all along into thinking that any other couple will get married on May 7th. Plus, they've pretty much eliminated everyone else except for Alex and Izzie, who were the obvious choice in the first place. And maybe when they say that it isn't Meredith and Derek getting married, they mean just in that May 7th episode.......never excluded the finale! Sorry, kinda just thought about this! I'm a big MerDer fan and I really want them to get married this season!!!!