For some reason, TK won't let me respond to your post about photo guestbooks so I thought I'd respond here.
I used Picaboo for my guestbook and am mostly satisfied. I bought a Groupon for $25 for $100 worth of product. The guestbook ended up being about $80 so I got a great deal. However, if I had paid the full $80, I would have been disappointed. The quality wasn't worth $80 but was worth $25 (if that makes sense).
The software was easy to use (although it did bog down my computer but I think that's because of all the high-res photos I was using.) But as I said, since I didn't pay full price, I am satisfied. Let me know if you have any specific questions.