Try these...
http://bestdestinationwedding.com/forum/t7159
http://bestdestinationwedding.com/forum/t985
Someone a long time ago did OOT bag CDs with a song that was important to each 'couple' guests. So she had her parent's wedding song, Aunt's wedding song, the favorite song she and her sister would sing when they were little, that type of thing. It was a cute idea.
One of the other girls also sent out a CD with beachy/latin music in her pre-travel pack.
Good luck with your search!