I'm so excited about this idea!! I just found it on TK.

FI and I are going to pick fabric that we like and goes with our home decor and cut it into quilting squares. Then put them out with fabric markers so each of our guests can put well-wishes on a square and I can sew it into a quilt. That way the well wishes of our guests can make us feel warm and cozy forever.
My boss just gave me a quilt rack from his barn a couple of months ago so after the wedding I can re-finish it and put our guest book quilt on it. This just made my whole week much better