When I got married a couple years ago, the biggest hit of all the gifts I gave were the little ZipZap r/c cars you can get at Radio Shack. They happenned to be on sale so I got one each for all the groomsmen and ushers (and a MustangGT for me too!). The guys all brought them to the church the day of the wedding and while the girls were getting their pictures taken and the guests were arriving, we were in our room of the church holding races around a makeshift racetrack on the linoleum floor! It was awesome!