An alternative to guest book

I love the traditions of weddings; however, I'm really interested in doing things differently for mine. Just not the same as other weddings and spice it up, but not too weird... you know? I want whimsical, unique, and original for my wedding. Since today is really slow at work, I've decided to do some online research on alternative ideas to the wedding traditions. Such as the post before this one. If we can pull off having our centerpieces look like cute pumpkin carriages, it would be adorable! Very different then having flowers or pumpkins! And yet, still super cute!
So, back to the guest book. I've been thinking of guest books, and wondering what I would do with mine, after the wedding! I mean, I don't remember ever looking at another person's guest book, or seeing theirs displayed anywhere in their house, which means to me that they probably have it in a box in the basement or up in the attic... I am in search of something different! If anyone has an idea, LET ME KNOW!I just found this website with a really neat idea for the guest book. Have all our guests write well-wishes for us, and put it in either a bird cage or large glass vase. It would be simple to DIY this project, cutting paper in just the right size and having multi-colored pens to make it colorful and then assemble them throughout a wedding scrapbook or something.

I also found an idea on etsy where they have a box, and paper inside where the guest can put their addresses and other contact information on it and also leave a little message for the Bride and Groom... which sounds pretty cool! Although we'd most likely already have their mailing address, if they were invited! But having all the other information and all together would be nice and make thank you cards go a little easier!Does anyone else have any other ideas?