Video guestbook -
http://www.thrilledforyou.com/Sorta kinda similar to the Marc Anthony invention, but it's for the guestbook only. We don't have any ideas for the guestbook, and now I'm considering this since we have easy access to macs/ipads. If you were at a wedding, would you use this? I'm not sure I can imagine many of my family and friends using it, but if they don't, at least it wouldn't be wasting a lot of money or time putting it together.
I want to get some more opinions before I see what FI thinks, cause I know that tech-nerd boy will be all over it.