I saw this on Pinterest and loved the idea!
http://www.readymade.com/blog/design/2011/02/09/wedding_wednesdays_postcard_guest_bookSo I've been searching for cool vintage postcards, and some local. Do you think it would be acceptable to put a box for them or to say something along the lines of feel free to take it home and drop it in the mail over the next couple months to suprise us? They'll all already be stamped so its just if they'd like to mail it on their own? And I will go ahead and pre-address them as well.