C.R.A.F.T. shares 28 unique guest book ideas.
Here are a few of my favorites.
First letter of your last name.  
If you need more space use the first letters of each name =
 Husband & Wife 

This is a beautiful look for the wedding, and I'm sure the cards could then be kept in a beautiful box.

A slice of wood could be just the right thing for some.

Maybe a globe would be the right fit for some.

What do you like?  What do you do?  Maybe a puzzle put together for guests to sign, or not put together, and let them sign individual pieces.
 
 
