Those little mementoes from the wedding that don't make it into the photo album because they will not fit - such as the flowers from the bouquet. These can be displayed in glass domes or a shadow box. Boxers by FrameMica can be built to accommodate all those three-dimensional objects - even a wedding dress.
Celebrate with personal wines, Champagne, and even non-alcoholic bottles with the couple's names, wedding date, and a message. Some companies will even include two flute glasses. Wine gift baskets are nice with grapes, crackers, cheese, and even chocolate. A wine cooler or bottle coaster are fine gifts to display or keep bottles cool.
Sweets for the new couple! If you know they love chocolate, stop into any high quality candy store and have them put together a speical gift set.
Do you know if they have a special decorating theme or hobby or collection that you could add too. Remember these would be items the couple may not buy them self.