While I was personally disappointed by this website's lack of an amazonesque algorithm to suggest books I don't think there is any question it would be a tremendous resource for our community. It would really do a lot of the legwork for us as far as galvanizing the budding reading culture here at PCH. It would also make integrating some of the changes to summer reading people suggested much easier to accomplish. Creating a profile (with the exception of adding one's books) is very simple and could easily be accomplished in tech within weeks. It is worth pointing out that creating profiles with a school email would make keeping track of kid's logins much simpler and potentially save lots of headaches down the road.
Great suggestion Gillotine.