Wedding Guest Book...Print?

At a recent wedding, the couple chose to forgo a traditional wedding guest book and encourage guests to sign a print instead. The print was of a tree, illustrated in cartoon rather than realistic fashion. The date and the names of the couple were on the trunk. Each guest was encouraged to stamp a finger in green, chartreuse or brown ink and place their finger or thumbprint on one of the branches. Then, each guest wrote messages of congratulations somewhere in the white space of the print. The print was matted and framed, then placed on the wall of the couple's new home.

Did you do depart from the traditional guest book?