I've got a few suggestions:
The first is that if you are having a lot of guests who have never attended a Jewish wedding, you might consider including the meanings of the Jewish wedding traditions that you will be incorporating in to your ceremony. You can find a glossary of these traditions here: http://www.jewishweddingnetwor…..traditions
You can even print out a pdf copy at the bottom of the page.
My husband and I opened our program with a letter thanking and welcoming our guests, as well as a list of our wedding party who would be under the chuppah.