1. A system for collaboration and display among a plurality of users, each at a respective one of a plurality of computing appliances, the system comprising: mapping logic defining a mapped structure for storing a plurality of separate layers of data in a plurality of data layers; storage for associatively mapped storing of layer data in selected ones of said plurality of separate data layers, responsive to the mapping logic; wherein the mapping logic associates user annotation data for each of at least two of the plurality of users for storage as respective said layer data in a respective one of the separate data layers; a respective user input, provided by each respective user, providing respective user data for the respective user; wherein the respective user data for each respective user is stored within structured storage in a respective associated one respective one of the plurality of separate data layers as associated with the respective user, responsive to the mapping logic; and display definition logic controlling selection of which of the plurality of data layers are utilized in providing a display presentation to at least one of the plurality of users.