What a fabulous idea! I saw this idea on http://www.theknot.com/ under stationery pics and thought it was unique and potentially really funny! I used the wording and design of the mad lib found on the knot, but changed the names and colors and this is what I came up with:
I love it! We are going to print the wedding advice mad libs and put a pretty glass jar on the guestbook table for the finished mad libs to go in. I really think our guests will get a kick out of this idea as we have some guests with great senses of humor, I can't wait to see the responses! After the wedding, I am going to put the madlibs in an album for us as a fun keepsake!