I prefer weekly photos as you can tell and don't think it is too much to ask. Annette had a email subscription of puppy buyers, potential puppy buyers, people interested in just watching the puppies grow, other breeders etc and she would create a word document (later a pdf document when she figured out how to do it) that had an update of the puppy, how each one was growing and snapshots. It took a bit of time considering she did one file for each puppy, each week, but people recieved more than just a photo. They found out the weight, health and if she noticed something new about their temperament, she would put it on. She would also put on updates about diet changes, etc and how mom was doing. It made everyone feel comfortable with buying from her and she would get emails from other breeders saying how wonderful it was to see the photos even though they weren't buying.
For me, it is a puppy I will be with for the next decade so I want to see how things are going during those first (and very important) 8 weeks.