Whether you go for the simple single fold program, or a multi layer program, it's a really easy way to incorporate your wedding colors and style into the ceremony!
If you're creative with powerpoint, you can easily come up with a monogram, or if Photoshop is easy for you, an ornate wedding logo can also tie it into the invites!
The most important thing is that it reflects you! Have fun with it, add some ribbon, a bit of color or a special poem. It's a personal choice what you do with it.
Also- if you're expecting some kids and want to keep them occupied during the ceremony, a great program is the kids coloring program.