1. A system for use by a plurality of users, the system comprising: at least two computing appliances each comprising: associated input apparatus, display logic and a display apparatus, each of the computing appliances providing a display presentation that can be viewed by an associated said user; memory structured as storage comprised of a plurality of areas of memory, wherein the storage is distributed among at least two of the display computing appliances comprised of at least two sets, each said set comprised of at least two duplicated areas of memory providing duplicate local storage in each set of at least one of the duplicate areas of memory, and wherein a change to one of the duplicated areas of memory, at one of said display computing appliances, results in storage of the change in the duplicate local storage in at least one other one of said display computing appliances, wherein, for at least two of the users, each said area of memory is associated with one said user, to provide associative storage of data associated with the associated said one said user; wherein the display logic at each of at least two of the computing appliances provides said display presentation comprising a video display viewable on the display apparatus at said each of at least two of the computing appliances; input logic responsive to input via the input apparatus of user annotations generating corresponding annotation data having an associated image representative of the annotations at each of at least two of the display computing appliances; wherein the annotation data is stored in the area of memory associated with the user providing the input of said annotation data; and, wherein the display logic provides an updated said display presentation responsive to at least a part of the annotation data from at least two of the areas of memory, wherein the updated said display presentation is provided for viewing at each of at least one of the display computing appliances.