I can't comment on the full size picture as clicking it took me to another site where I wasn't allowed to view the picture (don't link to such places??).
My opinion FWIW from the small picture above, is that your verdict of 'terribly out of focus' is not an accurate assessment. It's obviously shot at full aperture judging by the background, so you've got nice subject isolation with enough context. Also, looking at the bride's face it looks in focus, especially the eyes, which is where you presumably focused? So viewers are not immediately going to say "Oh wait - the rest of her isn't so sharp, and the groom is also unsharp". I'd say you got a good picture with the point of focus in the right place, but possibly you could have done with f4 instead? It's not a disaster though - I think most wedding guests would be pleased with that.