What can you do instead of a guest book?

Something new and different is a "Wish Tree." Right when your guests walk in to your wedding or reception, can be displayed an actual tree (could be a real Ficus - for indoors - or something to plant at their home or a silk tree) where guest can write a special "wish" and roll it up and tie it onto the tree or it can be a small card that's hung on the tree. The bride and groom keep the wishes and place the tree wherever they would like to always have a special reminder of the wedding day.