Xpost 2010: photo guest book ideas?

My FH got me an early bday gift.. a Pogo. Baically it's the new polorid digital inkless printer that allows you to take a pic on your digital camera and send it to this small printer (the Pogo) and have it print on 2x3 paper with a sticky back.

As soon as I got it I was thinking... Is there a way to get people to take pics of each other or themselves using a digital camera I supply, have it printed right there on the printer, stick it to a guest book, and write their note as well?

I really want a photo guest book, but a photo booth is looking to be out of our budget more and more... I would all ready have the equipment needed and the paper is about $0.16 a sheet.

Does anyone have any suggestions how I can make this work? I feel like if I leave it to guests they may have difficulty using it, or not realize what they are supposed to do.
Do you think i can 'hire' someone I know who wouldn't normally be invited to my wedding as a guest to take the pics? Can I hire someone I don't know? where would I look?

Any other suggestions on how to make this or any other type photo guest book work would be greatly appreciated!

Thanks